I am having the same issue on samsung m51
I have searched Google to found out to disable video enhancements will fix it but sadly I didn't found any option on this phone's setting.
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
* Check app cache: Clear cache memory of a particular application : Setting >Apps >Now pick the app. For example 'Samsung Internet' >Storage >Clear Cache.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support
1. Uninstall Updates of YouTube
2. clear cache of nearly all the apps. I didn't clear the cache of one ui.
3. clear cache and data for youtube.
i am using f62 and my problem isnt resolve after doing this, please help me out
please you can mail me your details on the mail id below. so i can reah out to you and take necessery gide with you.
I also facing the same issue of AUTO BRIGHTNESS issue while watching HDR videos if you found any solution so please let me know in my mail id email@example.com