Damn, that's a lot of videos for them to contact the creators and ask for permission to use their content as machine learning training content. Unless of course, they didn't, and just went ahead with it anyway...
https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=OJ:...:
“This Regulation does not apply to AI systems or AI models, including their output, specifically developed and put into service for the sole purpose of scientific research and development.”
https://github.com/LAION-AI/BVD:
“LAION-BVD is released exclusively for research purposes and not for commercial use”