Two kinds of favourite
Save a channel from its guide. Save a film or series from its title page. My List separates channel favourites from programme bookmarks, while episode checkpoints appear in their own section.
Remove a choice
Open the saved item and use the same save button again. The control confirms its current state. You do not need to keep a recommendation forever; a shorter list can make the next visit quicker.
Storage is local
These choices stay in this browser and are not synchronised through an account. Clearing website data can remove them. If something is missing, check the browser and device before clearing more storage. A home-screen shortcut is convenient but does not create a cloud account.