Mate Translate extension stops Cloudflare captcha from working correctly. If you have that, simply disable it.
For laggy Youtube, in Brave browser open a new tab, then paste this:
chrome://flags/
Then search:
Choose ANGLE graphics backend
Then choose:
OpenGL
That’s it. You can bookmark Experiments page too, so you can easily access it later if needed.
These fixed my Cloudflare captcha and laggy Youtube problem. Hope these help others too.