Create an additional Profile:
The Brave Browser user Profiles are in sub-folders of the ‘User Data’ folder at:
C:\Users\username\AppData\Local\BraveSoftware\Brave-Browser\User Data\
The initial user Profile created with your original installation of Brave Browser, is in the folder named ‘Default’ at:
C:\Users\username\AppData\Local\BraveSoftware\Brave-Browser\User Data\Default\
After that, the next Profile that you create, will cause the creation of a folder named ‘Profile 1’:
C:\Users\username\AppData\Local\BraveSoftware\Brave-Browser\User Data\Profile 1\
After that, the next Profile that you create, will cause the creation of a folder named ‘Profile 2’:
C:\Users\username\AppData\Local\BraveSoftware\Brave-Browser\User Data\Profile 2\
And so on . . .
–
If you want to copy your ‘Default’ folder ‘Bookmarks’ and ‘Bookmarks.bak’ files, over to your newly-created ‘Profile 1’ folder . . . you may do so.
If you Exit / Quit Brave Browser, then you may copy the bookmarks files, between user Profiles.
Thus, when you open your spare user Profile - that you want in order to not interfere with the TV - your spare user Profile will have the bookmarks that you like.
–