Recently I learned that YouTube has tools for synchronizing dubbing and lip movement. And these tools work really well. I learned about them from this article
https://gyre.pro/blog/best-ai-lip-sync-dubbing-tools-for-creators-guide and have even used them for some of my projects.
In fact, if you read informative blogs like this one, you can learn a lot of interesting and useful tips that make working with YouTube content much easier. And this applies to working with both video files and audio tracks.