Not a daft question and the answer is yes. However the the wiring would be a real hassle as it is the opposite end of the room, around a door frame and along a different wall. I have lots of heavy bookshelves too so going under floorboards would be a major headache .
In other words, the Hifi fires down the length of the room. The TV is on a wall firing across the room.
I’m not expecting the same sound quality from films (or even music DVDs) as my Hifi. I listen to music much more than I watch films.
My TV Is a Samsung with one of those fancy slim boxes that has all the connections (plenty of HDMI inc an ARC socket)
if space wasn’t an issue I’d get the Sony 7.1 AV Amp out of the loft (it was well regarded 6 years ago and has lots of HDMI sockets) . I could add a couple of small bookshelf speakers . But I really am short of space.