Playing music over movies causes them to sync

Hey HN! I've been wanting to discuss this for some time now and I think I have enough evidence at this point that I can safely talk about it. I've been experimenting with playing music over movies and noting the effects. They seem to sync up, and the movie becomes a music video of the song. I am not sure if it matters who watches the videos but I feel this may affect the final result.

As an example where this is very noticeable is here at 20:55: https://x.com/KyleSerbov/status/2044696810095255732

I have never heard of anyone really talking about this, so I am curious to see what you guys think of it. I often wonder if the filmakers would be interested in seeing my recordings of their films.

I really like the visualiser the guy does at 2:22 here: https://x.com/KyleSerbov/status/2046164265502212137

I have found it even works when the music is backwards. Here is another example: https://www.youtube.com/watch?v=w40MXiiXosY Please note this video is region blocked in Australia, Japan, New Zealand, United Kingdom.