For these CCC videos, please link to media.ccc.de. They built a media distribution platform for us that gives higher quality, allows downloads, and uses no tracking. Why not use it?
I'm in Stralsund and it straight-up won't play the video in Chrome. Just keeps spinning. Downloading from youtube works as well, even though you have to resort to youtube-dl, and i like having youtube track what i've seen so i can refer to that later in case i forget having seen something. Plus, the CCC org is not any more trustable than youtube.
