Worked for me. As directed, removed batteries when restarted then inserted batteries and it now fast forward in YouTube and YouTube TV.
Thank you so much for the fix! Finally seeing the slider zip across the screen again just made my week!
I haven’t had a chance to let this hypothesis play out to test it, but I’m willing to bet that having Fast TV Start turned on is the real issue here. It’s essentially the same thing as standby vs. restart on a computer. Meaning every time you turn the tv “off”, it’s actually going into standby, so if you only ever turn it “off” with the power button on the remote, you’re never actually restarting the system. That dawned on me when I saw the tv’s boot screen and realized I hadn’t seen that in forever.
WORKED GREAT THANKS!!
Worked for me as well, thank you so much!
Settings>Power>Restart>Remove Batteries worked for me