It could be a problem of codecs on your system. Tor Browser allows for
gstreamer to be used which means that formats you play on your system should
also play on the browser. Try going to
about:config
search for media.gstreamer.enabled
and turn it false. Now go to youtube and try playing a video. It should use
html5 and webm to play.
If it doesn't work check if you messed with some Noscript configuration.
IMPORTANT:
If people want to support the tor NETWORK they should donate to people
running relays and not Tor Project itself. For example read this Tor Blog
post:
https://blog.torproject.org/blog/tor-weekly-news-%E2%80%94-june-24th-2015
Nos Oignons really needs some love if we want the network to continue
existing!
