"Those users will end up
visiting the site and taking on nonfree Javascript programs, being asked
to install nonfree software"
Yeah, and those are exactly the users that don't know about the issue and
have to be informed about it - precisely the right audience.
It's important that people don't *have to* use non-free software in order to
watch the video, and that it's available in an free format.
"I think it would be better for people to upload their videos to their
own websites and/or sites that will help transcode to formats that favor
Free Software such as archive.org."
Why not just bury them in the garden?
Do you honestly think anybody who needs to be taught about the issues of
non-free software is looking for videos at archive.org?