Found this nifty tool recently:
RSAF - An Android Storage Access Framework document provider for rclone
Based on rclone 1.67 (latest version). First app that I've seen for android that supports mounting arbitrary remote drives (google drive, WebDAV, SFTP) and supports streaming.
Had to manually add it to the battery optimization exclusion list on a OnePlus device (like in 3 different places, for background running, Optimize Battery Use etc.), or it would lose connection.
But after adding it to the battery exclusion list, I could reach over 280 megabits/s streaming 4K HDR video from a local linux machine!
Basically added a config for WebDAV (or SFTP), added an alias to go to the specific folder, and opened that folder within the app. Was able to stream using VLC 4K HDR with very rare stutters via the local wifi.