So, I watch a lot of YouTube, and I've seen what the experts can do. Attached is a picture of the ending screen of my favorite YouTuber, Nerd³. You'll notice the icons with annotations over. They actually play out as videos. Luckily, I know how to make annotations. I'd like to know how to make the videos. I'm doing a Spyro 3 series, to teach me how to edit, considering how long that game is, and so having done the first episode, and only learning how to extract sections of video to delete, I'd now like to focus on an ending. A start wouldn't go amiss either, but that's neither here, nor there.
TL;DR, I'd like to know how to play videos over my current video, not taking up the entire video window.
Type in the Help:
Track Matte, Garbage Matte and Picture in Picture.
I'm trying to stay away from the adobe help, because all I saw was videos, and my internet is inadequately described as awful.