For those which reported missing references for the message I'm replying to (my own one), here is the references. Now they should appear normally for those reading using the forums.
[1] https://downloads.softwarefreedom.org/2017/conference/0-keynote.webm . According to https://softwarefreedom.org/events/2017/conference/video/ , it's under CC BY-SA 3.0 US. [2] https://media.libreplanet.org/u/libreplanet/m/the-free-software-movement-in-the-age-of-trump/ (under CC BY-SA 4.0).
