You can't download the youtube app onto your tv?
Even my old smart tv's have that ability.
No doubt any of the streaming devices (Firestick / Roku, etc) Have youtube on them.
It does and I do watch YT on it, but sometimes I’ll be surfing YT on the pc, much easier, and want to cast a video to the tv. I could search for it separately but it’s easier just to cast it.