Samsung is now revealing the end of Flash and you need to know that Google is the writer and maintainer of the app. But as Flash is all Adobe and they didn't update it for this platform for years it's finally crashing and dying. This mess is causing a lot of folk to explode with most taking it back to the TV maker which can't fix it since the two companies that supplied the app have walked away.
You can google it but yes to your last question.
I have a Samsung Smart TV, model number UE48JU6400KXXU.
I have paid for films on YouTube and managed to watch a couple using the YouTube app on the TV. Excellent!
Problem is that now when opening a purchased film, it freezes at the loading screen and will not continue, I have to back out of it and can then watch normal YouTube clips, but cannot watch any of my purchases.
I have tried resetting the smart hub but to no avail.
Has anyone else had this problem?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic