YouTube seems to have removed VP8 support for a lot of old videos (or: our VP8 implementation is somehow broken?) – the solution for now is: Go to Preferences>TenFourFox, then turn on VP9 support by checking "Enable MSE/media quality options (slower, if available)"
OS X 10.4.11
eMac - 1.42 Ghz PowerPC G4
1 GB RAM
Flash workaround installed years ago. Lol
As Stefano notes above, Youtube now (a few days ago) presents with...
Your browser does not currently recognize any of the video formats available. Click for questions about HTML5 video.
As a kinda strange workaround, if I click on a random video in the right-hand scrolling window and let it play for a few moments, I can get the original video to play by clicking TenFourFox's back-button.
It unfortunately doesn't work for all videos.
It also looks like... Enable MSE/media quality options (slower, if available) is not available in TenFourFox 38.9.0 preferences!
Chris Pederick's User Agent Switcher 0.7.3 has no effect.
I've gotten the same problem and MSE works, but it's too slow to listen to music; it keeps pausing with the rotating circle, even after the gray line at the bottom seems to indicate that it's loaded all the way.
Hello, guys. Taking advantage of the space of this post, I come to ask a question: Is it possible to watch hangouts live on YouTube? I own a PowerBook G4 with OS X 10.4.11 and Power PC 1.5 Ghz processor with 1GB of memory. I have already installed two plugin programs - Perian and AVC1 Decoder and nothing. About recorded videos, I can watch them normally. On the HTML5 YouTube page, the only bugs it shows that are not installed are H.264 and MSE & H.264. Thanks in advance for your feedback.
Rafaelrosa81, if hangouts require H.264 (even though I wasn't able to confirm this on any Google help page) you're out of luck. Perian and other QT plugins work in QuickTime Player, but not in TenFourFox. The only chance I see for PPC users is to update to 10.5, install Safari with Leopard Webkit (which has H.264/MP4 hardware support) and try if it works.
Cameron, while checking this I noticed that Safari 5/LWP doesn't support MSE but still plays H.264 videos.
Dear Chris, thank you so much for your help solving this YouTube problem. BTW, is it recommended to keep the checkbox "Enable MSE/media quality options (slower, if available)" always checked, not only for YT?