How StreamBridge works.
StreamBridge gives Plex a virtual disk. Plex treats it like local media, and the video streams only when Plex reads it.
A library folder for Plex
StreamBridge mounts a virtual disk on your Mac and adds it to Plex as a library folder. Plex scans it and sees ordinary movie files, so artwork, watch history and remote streaming all work as usual. The movies themselves aren't on your drive.
Streaming on demand
Plex reads only the parts of a file it needs, whether it's scanning, seeking or playing. StreamBridge fetches just those parts from Real-Debrid when Plex asks for them, never the whole file.
A small cache
To make scans and starts fast, StreamBridge keeps about 25 MB per title on your Mac: roughly 6 GB for 240 4K movies. What you watch is kept for a while too, up to a limit you set, and the oldest goes first. Settings shows how much it's using.
What it handles
StreamBridge finds a working stream, serves the data the way Plex expects, rides out slow moments from the source, and gets a fresh link if one expires mid-movie. Plex doesn't notice any of it.
What you need
A Mac running StreamBridge, a Plex server on that Mac or your network, and a Real-Debrid account. Everything runs on your Mac.