I just got Linux Mint a few days ago. At first I wasn't able to get any sound at all, but after going through the Sound tab in Administration I was able to switch the sound to my USB audio (It's called "Logitec USB Audio" according to Mint), however it only truly works with Rhythmbox rather than Totem. I've been jumping around a billion forums, and some people have said something about gstreamer and Totem so I'm guessing their related somehow, while also saying something about gstreamer and Flash, so I'm guessing that the reason why I don't have audio on Youtube is because of the no audio on Totem. Being the new person I am though, I have no way of going about all this business.
How would I be able to resolve this problem?