Direct answer
How to watch local videos on Quest 3
Install Finally, copy a video onto the headset, SCAN, press play. That is the whole first hour. MP4, MKV, VR180, 360, fisheye, SBS, photos — same vault. No catalog login. When the library grows past what you want on the headset, switch the same player to SMB / NAS.

First hour
One known-good file.
- Install Finally VR Video Player.
- Connect the Quest over USB and copy a file you trust (a short 1080p MP4 is a better first test than an 8K 180).
- Drop it where you will find it —
Movies/Finallyis the manual’s fastest path — or use Add videos folder / Add files through the system picker. - In the Lobby, press SCAN. Open the row. If projection is wrong, fix it once; after OVERRIDE consent it sticks. See VR180 / 360.
USB sticks Finally can see are SAF / OS-exposed volumes, not host MSC. A yanked drive may need a fresh grant. USB optical DVD is a narrower Quest path, not the everyday one.
Next
When local fills up.
Quest storage is not a NAS. Finally’s SMB path is the same product, not a different app. Keep using local for travel and the share for the shelf.
One file. One scan. Then the rest of the library.
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