It started a week or so ago, occasionally I'd try to watch a video but there wouldn't be any sound. I figured something was wrong with the video. All of a sudden last night, after watching (and listening to) a few music videos, the sound stopped working. Now no videos on YouTube have any sound. The sound works fine on other sites I go to. I went into my YouTube preferences but couldn't find anything helpful. iMac, OS 10.9.5. Any ideas?

unmute button?

I've been looking for something like that, but don't see it anywhere. Also, it was happening sporadically for the last week, so I don't think I hit a mute button by mistake.

Ha! Found it! Thanks for the help, now I can continue watching Christmas videos!