Potential oddball suggestiom, but possibly worth considering:

Get a Steam Deck, get some kind of kickstand accessory/dock for it.

I have no clue what your exact price points or screen size/dpi, or viewing distance preferences are, but I absolutely spend way more time ‘using’ my Deck to just play videos while I am lounging in my bed.

Also, of course, a Steam Deck is a semi-portable gaming device, and also a laptop… you can just plug a mouse, keyboard, and/or a fairly cheap wireless streaming dongle thingy into a TV as well, you don’t really have to bother much with a fancy low latency / fast response time set up if you’re just streaming vids or movies.

7.4 inch diagonal screen, 1280x800, ~12 hr battery life if you put it in a power save mode and just watch youtube or play a local file movie, OLED, $550 USD.

Cheaper than a flagship phone, larger screen than a flagship phone (though less dpi / lower res), probably more expensive than a… decent enough maybe? for your use case mid-low end tablet…

But also Valve is still selling the older LCD Decks for $300, which is probably roughly the same or slightly more than a maybe decent enough mid-low end tablet.

Or you could be in not the US and be looking at a different uh, price reality.