Yes - photo frame mode turns the TV into a rotating picture frame, alongside the 4K crackling fire scenes. See turning a TV into a picture frame.
Brightness is adjustable, and it is built to be always-on ready with remote-friendly controls and seasonal themes.
Yes, the ambient soundscapes are optional if you would rather play your own music.
You’re browsing inside Instagram, and its built-in browser isn’t allowed to hand links over to the App Store. Open this page in Safari and the link will work.
Tap the three-dot menu at the top right, then choose Open in external browser.