I second this, it worked for me too.
I’m using Version 1.47.186 Chromium: 109.0.5414.119 (Official Build) (32-bit)
I added https://www.youtube.com in Shields Down.
go to brave browser Settings > Privacy and security > Site and Shields Settings > Shields status then add youtube site (https://www.youtube.com) on Customized behaviors > Shields Down.
I’m also using ublock origin but youtube site does not crash anymore after doing this tweak. thanks to this community thread and to grimenio.