A lot of weird things got into the youtube updates recently.
For one if you do a youtube search and watch a video from the search list, you can never edit or get back to the search criteria bar... you have to go all the way out to the main youtube menu and re-select search.
Yep. I've had some luck using the Siri button to get back to the search term bar. But it's very annoying.
YouTube's app on AppleTV is mediocre. There's a huge number of little (mostly little) problems with it, along with a whole bunch of poor design choices - the one that always bugs me is interacting with the progress bar on a video. Any other app, you can hit the left edge of the touch surface to go back 10 seconds. But with the YouTube app, that first press brings up the progress bar, along with obscuring the bottom quarter of the screen with the top half of the thumbnails of a bunch of other videos, pausing the video, then a second press moves the play point back ten seconds or so, and then... you have to press the middle of the touch surface to get it to switch from paused to playing again. Three button presses instead of one, and filling the screen with needless junk. And then, if you want the thumbnails to go away right away, instead of timing out, you have to hit Back. But if it decides right then to take the thumbnails down,
poof, you've exited the video. It's a mess.
They've engineered a system where they train the user to hit "Back" a lot to back out of things or remove things from the screen, and about a third of the time it decides you're trying to get out of the app itself. I suspect this is where the new prompt is coming from - they're putting an "are you sure?" prompt on the screen to deal with their mess, rather than fixing the mess.
It feels like they half-adapted their code for SmartTVs to the AppleTV, and they've never tried anyone else's video streaming app for even ten minutes, to see if they could learn a few things.
It's particularly galling because the interface on the iPad is way better - double-tap anywhere on the left or right halves of the screen to go 10 seconds back or forward, and in full screen mode there, there are no thumbnails intruding, just the progress bar.