I for one think this is a great fucking video keep up the good work. Good Shit bro!

Man, cut the fucking grass wtf xDD

It's good enough, but you can improve a lot still!
I'd recommend first if you're gonna lean more towards the epic compilation side, or the meme-y material. You could theoretically find a great balance between both of them, but for that I'd advice you to watch the transitions (you use them kind of too frequently, and the effects take the focus away from the actual video). Also, probably choose another track, the Asgore theme doesn't quite fit with the flow you have here, hard to explain.

another question, why undertale music though?

Why is this a picture of Stardew Valley though?