Television recommendations please

Hisense 50U6HF arrived today. So far, excellent. Great audio, really nice picture, eliminated my multiple remotes to just the one, built in FireTV is fast and very responsive, YES it is castable! Going to have to adjust the picture a bit as the darks aren't very good, just did a quick look at HotD to take a look and it's not that good. Brights are great, darkness not so much.
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.