Rando

I had one of the initial batches and the hinge was too weak. They came out with stronger ones that are much better which I now have. It was cheap and easy to replace

There is also a magnify feature you can try to have it zoom in, you can find this under Controller settings> bind some button > System > toggle magnifier

I did this for a diff app. And did a back paddle that I have to hold for 3 seconds

You can change how far you zoom in or out under the regular steamdeck settings > display > Advanced > magnifier scale

I admit I have not tried this at all, but maybe check if there is a key combination to go full screen for FreeTube and map that key combination to a button! That’s what I would do

This doesn’t quite answer your question but I really like my Framework 13”. But that is not the kind of device you are looking for.

But I am just throwing out there - there is new products being announced by Framework 2-25 and there is speculation of possibly a yoga type laptop. Maybe it would fit what you are looking for!