I'm checking back in after 5-6 months or so. I noticed my chromebook updated to vlc 3.1 rc4 android beta, and noticed some new features but still don't see a cast icon... So either I am missing a setting or it still isn't there yet. My fear with vlc and chromebooks is that the VLC web app got abandoned because Android was coming to chromebooks and one could simply install the Android app. Now Android is here without casting functionality. In the next 2 months Crostini (linux for chromebooks) will have audio and gpu acceleration and Android VLC will probably stop catering to Chromebook users once again.
Also the Debian Desktop VLC app (most current for buster debian,) Can NOT cast on a chromebook either. Probably due to limitations due to security with Crostini. I just want to use VLC on ma damn Chromebook...
Thanks for all the hard work VLC