Unable to watch certain types of videos
On some videos, they'll fail to play, while others will work just fine. In particular, YouTube videos are hit and miss, and will sometimes work and sometimes not. I've tried installing Adobe Flash PPAPI, but it didn't fix the problem.
@Rhapsodic: Can you link a video that won't play?
It's actually a video linked from a school page so I can't directly link it, unfortunately. If I run into another example I'll leave it here.
If you have Windows you may need Windows Media Player and Media Feature Pack.
Vivaldi uses installed Windows codecs to decode videos.
If your hardware has problems with video acceleration you may disable with opening setting at