I tested on my collection, but they come from personal DVDs so it's not tested with a wide variety of formats.
I don't personally use the music or photo app, but if there is interest I might add importing those into their apps.
What it does
* adds mp4 files found in ux0:/video and subdirectories to the video player database
* removes from database videos whose files cannot be found
* sets icons if found with same filename & extension .THM, .thm, .JPG or .jpg
What it doesn't do
* add files under uma0: for some reason the video player says "file type not supported" (uma0: mapped as ux0: works)
* check whether the media is actually playable
* create thumbnail (this is done by video app when you start it)
* set video size metadata (maybe later)
* import photos & videos into the camera app (maybe later)
* import music into the music app (maybe later)
Instructions
Download and install the vpk. Place .mp4 files in ux0:/video and run it whenever you have added or removed media. When mounting USB as ux0: on VitaTV you might need to run every time you remount, nevermind it only takes a minute. Press cross to update the database or triangle to delete all media from the database (not the files). Now go to the video player to play your videos.
Links
Download: https://github.com/cnsldv/MediaImporter/releases
Source: https://github.com/cnsldv/MediaImporter
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