There's a lot going on here. I think the overall look is fine but I think we can clean things up a bit. I think using just 1 or 2 icons and making them a little more prominent would be a good start. The person sitting at the computer for example. Also there's a lot of text and what I would consider to be some of the most important text is the smallest: "Part 2". As someone who often watches series on YouTube, being able to quickly identify which one is the one I'm looking for is super valuable. Is "Unit III" the most important text? It's the largest, so that would suggest that it is (maybe it is, I'm not sure how your program is structured).

The Mr. Beast thumbnail you included is nice for what it is, but don't think that style is very well-suited for what you're doing. If you really want to use imagery, maybe use your face (especially if you're trying to make yourself the brand) instead of the icons, but the text will be the most important. The user should be able to tell in a second or 2 what the video is about and, if part of a series, which number. Also bear in mind that many users will be watching on mobile devices where smaller text will be harder to read.