Most people will readily say this - but I have absolutely no idea what I've done to change any form of settings. However Mozilla won't play any Youtube videos or streamed shows. The screen just stays blank (black). I've uninstalled and reinstalled flash and that didn't fix it, and I've tried most of the troubleshooting options, none seem to work. I've opened up Internet Explorer and they have no problems playing any video. It's just Mozilla. I'm not too sure what the issue is. I've googled such problems and any form of related issues seem to want to clear any cache or cookies - didn't work.

Anyways, any and all help would be greatly appreciated. Thank you