That's rarely an Avast issue. Did you try disabling the usual? Google Disable flash player Acceleration in case you are new to this.
Also, Chrome is packed with its own player so I try that too.
So I was watching an episode of an anime today - like I do every day - however, today, there was a popup when clicking "play" on the following video: http://www.animerelief.com/watch/subbed/episode/mahouka-koukou-no-rettousei-episode-26 and Avast said it blocked a webpage. I figured that was no problem, as it had happened before (when clicking play on the video). However this time, when I load the webpages with videos, my flash player crashes, and I'm unable to watch any videos.
I have no idea what the problem could be. I scanned with Avast, Spybot, and MalwareBytes. I'm at a loss for what to do now. Does anyone have any suggestions? What info do you need? I'm using Windows 7.
Thanks for reading, and I hope to find a fix so I can continue streaming!