Our conference streaming web interface requires JavaScript, but all of our streams are readily available on live.fsf.org and can be played with the video client of your choice, such as VLC or mplayer.
You can watch the streams directly by using vlc or some other media players with the following URLs: https://live.fsf.org/stream-123.webm https://live.fsf.org/stream-141.webm https://live.fsf.org/stream-144.webm https://live.fsf.org/stream-155.webm https://live.fsf.org/slides-123.webm https://live.fsf.org/slides-141.webm https://live.fsf.org/slides-144.webm https://live.fsf.org/slides-155.webm https://live.fsf.org/stream-123-480p.webm https://live.fsf.org/stream-141-480p.webm https://live.fsf.org/stream-144-480p.webm https://live.fsf.org/stream-155-480p.webm or using something like this on a terminal:
vlc https://live.fsf.org/stream-123.webm mpv https://live.fsf.org/stream-141.webm ffplay https://live.fsf.org/stream-155.webm