So apparently, I’m not the only one who’s been having issues with “video not available”. It appears other youtubers are experiencing this as well. This glitch appears to be happening with videos when the setting is on high quality and also with the Firefox browser. Currently, it’s working on and off now, which is quite annoying.
The conspiracy theorist in me would say that this could be a cheap way for Google to promote Chrome. I haven’t tried Chrome with youtube, but my bet is it works splendidly.