When I maximize a youtube clip, the icons in the bottom-right corner (one of which is an "exit full screen" button) don't even show up. Plus, the clips keep "flashing". I don't know if anybody else is having these issues? I have pepperflash installed and flash works elsewhere but mlb.com will not play, just spinning wheels (and spinning and spinning). Firefox has none one of these issues (but looks like crap in linux). I'll have to check back in a year, this thing doesn't seem to be ready for prime time.
Your Linux and Hardware is not really good enough and ready for prime time
YT and mib works on Linux for me. I tested on a oldfashioned Debian 8 x64 with Vivaldi Final 1.2.490.43 and Snapshot 1.3.537.5.
So dont tell us, Vivaldi is not working. :woohoo:
Which Linux, which graphics/GPU/driver?
Did you install videos codecs and read https://labs.gwendragon.de/blog/Web/Browser/Vivaldi/vivaldi-debian-install-libffmpeg-en and https://gist.github.com/ruario/bec42d156d30affef655