I have a channel teaching filmmaking and I do movie reviews "mostly sci-fi such like Star Wars, Avengers, MCU, etc" and I write a video script for the review and I make clips from the movie, or series, relating to what I'm talking about in that particular sentence and that's how the whole movie review is made.
But this would require you to be familiar with doing that such as editing video, making clips, piecing them together, adding some flare, etc. But no one ever said managing and running a YouTube channel was going to be easy. Unless you watched tutorials on YouTube. LOL