FOSDEM 2025 https://peertube.watch/c/fosdem2025_videos/videos Recordings of the talks given at FOSDEM 2025, 1–2 February 2025, ULB (Université Libre de Bruxelles), Brussels. FOSDEM is a free and non-commercial event organised by the community for the community. Its goal is to provide free and open source software developers and communities a place to meet, share ideas and collaborate. Schedule: https://archive.fosdem.org/2025/schedule/ Original recordings: https://video.fosdem.org/2025/ This is an unofficial mirror of the FOSDEM video archive. Each video description states the licence of the recording and links to the original file and event page. Sun, 18 Oct 2026 20:53:44 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.watch FOSDEM 2025 https://peertube.watch/lazy-static/avatars/3b284627-b75f-409e-ac2e-10f4c2946f43.png https://peertube.watch/c/fosdem2025_videos/videos All rights reserved, unless otherwise specified in the terms specified at https://peertube.watch/about and potential licenses granted by each content's rightholder. https://peertube.watch/feeds/podcast/videos.xml?videoChannelId=3141 <![CDATA[MapTCHA, the open source CAPTCHA that improves OpenStreetMap]]> https://peertube.watch/w/qFqMjJdJ5ZwkQxpBzxS5Y7 https://peertube.watch/w/qFqMjJdJ5ZwkQxpBzxS5Y7 Sat, 01 Feb 2025 09:30:00 GMT Bots and spam are challenges for online platforms. Traditional CAPTCHAs help block bots, but often involve improving proprietary maps and software, while exposing user information to third-party CAPTCHA providers. OpenStreetMap (OSM) has many objects remaining to be mapped, but the quality of AI-generated objects is not high enough for direct inclusion. We introduce “MapTCHA”, a CAPTCHA that leverages the uncertainty of interpreting imagery with computer vision, and provides human verification for AI predictions: users are asked to identify images containing correctly interpreted objects, e.g. building outlines.

We separate known positive cases, where both the AI prediction and OSM contain an object, from unknown cases, where objects are only in the prediction. We also generate known negatives from areas where objects are neither in OSM nor in the prediction. We show a mix of these images without telling the user which are which. Humans are validated by confirming the known positives and negatives, and we determine the truth of the unknown images by aggregating users’ responses through voting. When the voting indicates high confidence that an object exists, we suggest the location for OSM mapping.

Our prototype identifies buildings using aerial imagery with high enough resolution to visualise individual buildings and medium-sized objects. Image recognition is provided by fAIr, an open-source AI-assisted mapping system developed by the Humanitarian OpenStreetMap Team (HOT). It allows the training and fine-tuning of pre-trained machine learning models to segment building footprints.

Future plans include expanding to more objects and types of imagery; refining AI models; integrating MapTCHA into various login systems; and enhancing the user interface.

In this session we will talk about how we are building this solution, how it might enhance mapping efforts in OSM that will support projects on the ground, and some of the challenges of working with AI derived data.

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “MapTCHA, the open source CAPTCHA that improves OpenStreetMap” by Anna Zanchetta, FOSDEM 2025.

Original recording: 2025/aw1120/fosdem-2025-5879-maptcha-the-open-source-captcha-that-improves-openstreetmap.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult MapTCHA, the open source CAPTCHA that improves OpenStreetMap Bots and spam are challenges for online platforms. Traditional CAPTCHAs help block bots, but often involve improving proprietary maps and software, while exposing user information to third-party CAPTCHA providers. OpenStreetMap (OSM) has many obje... <![CDATA[Creating an Open Knowledge Graph for Climate]]> https://peertube.watch/w/qsgW8H8ZTxvuFToAJRKsev https://peertube.watch/w/qsgW8H8ZTxvuFToAJRKsev Sat, 01 Feb 2025 09:30:00 GMT semanticClimate is a global hybrid community where interns from colleges (mainly in India) create climate knowledge to help the world make informed decisions. We work with trustable material such as the UN/IPCC reports (over 15,000 pages of important, but dense text). The resulting knowledge products include:

  • term-based dictionaries (ontologies) enhanced with Wikipedia and Wikidata
  • a Corpus tool for scraping and analysing the current Open scholarly literature
  • a knowledge graph created from the above with navigation tools

and F/OSS software to make this easy and automatic.

semanticClimate interns come from high-school up and need have no knowledge of software. They learn-by-doing, and in some weeks have 2-hour online sessions daily - these are recorded and transcribed to text for all to see. Interns are encouraged to give public talks (e.g. OKFN, Wikipedia, CODATA) and to make 5 min videos. All software is modular, Git-branched, versioned and unit-tested. Where possible we publish it in J. Open Source Software.

The session image is part of our Climate Knowledge Graph
(my email is peter.murray.rust@googlemail.com. I can't change it in the form!)

Slides & links

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “Creating an Open Knowledge Graph for Climate” by Peter Murray-Rust, FOSDEM 2025.

Original recording: 2025/aw1126/fosdem-2025-6006-creating-an-open-knowledge-graph-for-climate.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult Creating an Open Knowledge Graph for Climate semanticClimate is a global hybrid community where interns from colleges (mainly in India) create climate knowledge to help the world make informed decisions. We work with trustable material such as the UN/IPCC reports (over 15,000 pages of import... <![CDATA[Welcome to the Legal and Policy Issues DevRoom]]> https://peertube.watch/w/tstj1jw5Ld7pgjMMu8vzt1 https://peertube.watch/w/tstj1jw5Ld7pgjMMu8vzt1 Sat, 01 Feb 2025 09:30:00 GMT Welcome to the Legal and Policy Issues DevRoom

Slides & links

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “Welcome to the Legal and Policy Issues DevRoom” by Karen Sandler, Tom Marble, Alexander Sander, Bradley M. Kuhn, Matthias Kirschner, Richard Fontana, FOSDEM 2025.

Original recording: 2025/h1301/fosdem-2025-6602-welcome-to-the-legal-and-policy-issues-devroom.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult Welcome to the Legal and Policy Issues DevRoom Welcome to the Legal and Policy Issues DevRoom Speakers: Karen Sandler, Tom Marble, Alexander Sander, Bradley M. Kuhn, Matthias Kirschner, Richard Fontana, Track: [Legal and Policy](https://archive.fosdem.org/2025/schedule/track/legal-... <![CDATA[Program to Learn: The Power of Creative Coding]]> https://peertube.watch/w/nKNxXyhu8SpzH78sokZ2Jr https://peertube.watch/w/nKNxXyhu8SpzH78sokZ2Jr Sat, 01 Feb 2025 09:00:00 GMT What was your first programming language? For some, it might have been Logo; for others, Scratch. Regardless of the language, many of us have fond memories of creating playful, creative programs as kids - not because we had to, but because it was fun.

What many don’t realize is that the joy of these early experiences wasn’t by chance. It stems from the pioneering work of Seymour Papert, Cynthia Solomon, and others at the MIT Logo Lab in the late 1960s. They developed an educational philosophy called constructionism - the belief that children learn best when engaged in creative projects that connect with their personal interests. This philosophy shaped not only Logo but an entire lineage of educational programming tools designed to make coding fun, expressive, and meaningful.

Today, as the "Learn to Code" movement is challenged by generative AI, researchers and educators are revisiting these roots. They view programming not merely as a utilitarian skill for the job market but as a medium for exploration and creative expression. From analyzing complex data to creating art and understanding systems, programming can be much more than a language to be learned - it can be a language for learning.

For education, free and open-source software is a cornerstone. Free software ensures that tools remain accessible to all, fosters collaboration, and empowers learners to not only use but also understand and modify the systems they engage with - crucial for digital sovereignty.

In this talk, we’ll take you on a whirlwind tour of some of the most influential programming languages designed for children, from Logo, Smalltalk, and Etoys to Scratch and their modern descendants like Snap! and MicroBlocks. Rather than just describing these languages, we’ll show you their power through live demos.

  • Speakers: Bernat Romagosa, John Maloney, Jens Mönig, Jadga Huegle
  • Track: Keynotes
  • Room: Janson
  • When: Saturday 1 February 2025, 10:00–10:50 (Brussels time)
  • Schedule: FOSDEM 2025 event page

Slides & links

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “Program to Learn: The Power of Creative Coding” by Bernat Romagosa, John Maloney, Jens Mönig, Jadga Huegle, FOSDEM 2025.

Original recording: 2025/janson/fosdem-2025-5369-program-to-learn-the-power-of-creative-coding.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult Program to Learn: The Power of Creative Coding What was your first programming language? For some, it might have been Logo; for others, Scratch. Regardless of the language, many of us have fond memories of creating playful, creative programs as kids - not because we had to, but because i... <![CDATA[Code Is Different: How the Norms and Nuances of the FOSS Developer Community Drive Content Moderation on Code…]]> https://peertube.watch/w/hQjhYXV2BryPCuuKzDLBnV https://peertube.watch/w/hQjhYXV2BryPCuuKzDLBnV Sat, 01 Feb 2025 09:00:00 GMT Software code is not just content—it’s the foundation of critical digital infrastructure, and its unique functional purpose demands a specialized approach to platform governance. Unlike other digital media, code is widely duplicated, remixed, and shared under open source licensing terms, presenting distinct considerations for copyright and moderation. Additionally, the dual-use nature of software, such as security research projects, introduces complex challenges: tools designed to identify vulnerabilities can also be exploited for malicious purposes. Moderating a code collaboration platform requires careful consideration of open source software’s function as critical digital infrastructure and the network effects of takedowns. Likewise, code collaboration platforms must reflect the free and open source developer community’s values of collaboration and transparency, while empowering maintainers to support the health of their projects.

In this presentation, authors of the recently published article “Nuances and Challenges of Moderating a Code Collaboration Platform” in the Journal of Online Trust and Safety will discuss key takeaways. We’ll provide an under the hood look at how GitHub has developed tools and policies tailored to the needs of the free and open source software developer community. This will include a diverse set of case studies, including how we’ve responded to legal and policy challenges such as the EU Copyright Directive and US Digital Millennium Copyright Act, how we’ve evolved our approach to dual-use software over time, and how notable incidents such as the youtube-dl takedown and reinstatement have influenced our developer-first approach to content moderation. We will also touch on the importance of community content moderation and the tools we have developed for maintainers to establish expectations for conduct and contribution on their projects. Attendees will leave with an understanding of how the values of the free and open source developer community inform the governance of code collaboration platforms and how they can engage with platforms and policymakers.

Slides & links

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “Code Is Different: How the Norms and Nuances of the FOSS Developer Community Drive Content Moderation on Code Collaboration Platforms” by Margaret Tucker, FOSDEM 2025.

Original recording: 2025/k1105/fosdem-2025-6120-code-is-different-how-the-norms-and-nuances-of-the-foss-developer-community-drive-content-moderation-on-code-collaboration-platforms.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult Code Is Different: How the Norms and Nuances of the FOSS Developer Community Drive Content Moderation on Code… Software code is not just content—it’s the foundation of critical digital infrastructure, and its unique functional purpose demands a specialized approach to platform governance. Unlike other digital media, code is widely duplicated, remixed, and ... <![CDATA[Welcome to FOSDEM 2025]]> https://peertube.watch/w/dqeB2vPU2fHHQn7bWfBiGM https://peertube.watch/w/dqeB2vPU2fHHQn7bWfBiGM Sat, 01 Feb 2025 08:30:00 GMT FOSDEM welcome and opening talk.

Join us for the opening of our 25th event.

Slides & links

Licence: Creative Commons Attribution 2.0 Belgium (CC BY 2.0 BE) (as stated in the FOSDEM video archive).

Attribution: “Welcome to FOSDEM 2025” by FOSDEM Staff, Richard "RichiH" Hartmann, FOSDEM 2025.

Original recording: 2025/janson/fosdem-2025-6712-welcome-to-fosdem-2025.av1.webm from the FOSDEM video archive. This channel is an unofficial mirror; FOSDEM is a free and non-commercial event organised by the community for the community.

]]> FOSDEM 2025 Science & Technology nonadult Welcome to FOSDEM 2025 FOSDEM welcome and opening talk. Join us for the opening of our 25th event. Speakers: FOSDEM Staff, Richard "RichiH" Hartmann, Track: Keynotes, Room: [Janson](https://arc...