There are only 2 belts you would be looking at, and the alternator is the tensioner for one of them. It takes all of an hour to replace the belts, and while you have the belts off you can check every rotating piece to find out which one is the offender. I doubt the timing belt would sound like that, because it's so loud and I think it would sound more muffled if it were the timing belt. I can't be certain of that, but I would definitely focus on the what rotates under the 2 belts up front first.
Side note: I'm also a little confused about the anamorphic widescreen video you have on your channel too. Are you talking about using the different recording of them? Or just adjusting the aspect ratio of the TV? I was an audio/video nerd for a while, but never learned about the different original recording aspects. Totally off topic, I digress.