Previously i had s10 lite, never faced such issue 🤦🏽
Note: I have found one temporary solution for this, long press youtube app -> click on settings & clear the cache. If it doesn't work then restart device. But as I said this is not exact solution it would again start struck/freeze after 20 mins...
Dear Samsung Member,
Greetings from Samsung Customer Support!
We acknowledge your query and apologize for the same. We would request you to register your concern in Samsung Members Application. So, our concern team gets back to you as soon as possible.
Please follow this path to register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
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Samsung Customer Support