Gotta throw a mention to the old Avicii/Rick Astley mashup (and RIP Avicii). Besides being a great mashup, the video just keeps pulling crap out of left field. Pure awesomeness.
Timely Tip:
If you see something someone else has posted and you dont know how they did it, just hit Quote and look at the code thats embedded in their post.
Funny or Die has a series of videos where they make fun of old episodes of famous shows. It's an awesome rabbit hole. They have a bunch of videos dedicated to pointing out Zach Morris is Trash