There are a lot of long nature videos on youtube meant for this purpose - some with relaxing music, some without. I'll occasionally play one on a TV when I know I'm going to be bouncing around the house all day, and it's nice.

I don't know of any actual livestreams like that, but some zoos have livestreams of their aquariums or exhibits that are cool too.

Artificial light. No parallax. Super bright bulb throwing light across the room unless you get a short throw projector, and this is going to get hot and noisy with the fan in an enclosed room for extended periods.

Your TV solution sounds better.

This reminded me of a character, Martin Silenus from Hyperion Cantos, who has a mansion. In that mansion all of the doors are actually portals. So when you walk into a new room you're walking into a new room on a different world. So like your living room is on Earth but your dining room could be on the moon. Always thought that was a cool idea.

I generally play a burning fire vid on my Philips Ambilight at night. It's a delight.

If prefer if it was a live stream of somewhere nearby. Maybe not as pretty but it's closer to actually seeing outdoors

I've thought about doing this in my basement rec room to make it feel more "open". Plan is to take a couple spare flat screens I'm not using, build a wood window frame around them, and put some curtains over them to further sell the effect.

Just haven't figured out a way to drive them besides sticking a raspberry pi on each one. That would also let me make them "real" windows if I want to feed in the camera views from outside.

Another option i was thinking about just earlier today is the "nature" wallpaper that used to be a thing back in the 70s or so. Whole walls covered in giant photos of rainforests etc. I still see them in customers houses on occasion, usually sun-faded which kinda adds its own ambiance

Reminds me of Total Recall