Of course there's a Bo Burnham video which is a prime example of, in my experience, what it's like to overthink.... Here's a comment from the video that I liked that also explained the video pretty well: "It's insane how he takes such seemingly silly, surface-level cinematographic ideas and manages to see what they're able to perfectly represent. You wouldn't think this could go beyond a kind of experiment in how long you can troll your audience or take the recording software with frame-in-frames, but instead he uses it as a perfect visual analogy for overthinking and anxiety; he makes a thing, he talks about it, he critiques that talking, he critiques his critique, and so on until the original project is almost entirely blocked out by his own thoughts, where he loses sight of the original vision and can only think about how much he hates listening to himself overthinking. This masterfulness pervades his style; almost every metaphor he makes is near perfect in communicating/evoking its message/effect, the flow of his lyrics always draws the listener in and further communicates his message... where did this genius come from?"