Download Manager Not Recognizing Existing Videos After Restoring YouTube Folder Backup

[erickyun]

Describe the issue

I backed up my YouTube app files by compressing the On My iPhone > YouTube folder into a ZIP archive using the iOS Files app.

After reinstalling the YouTubePlus IPA, I deleted the contents of the newly created YouTube folder and restored all files from my ZIP backup.

However, the app no longer recognizes my previously downloaded videos.

Expected behavior

The Download Manager should recognize existing downloaded videos after restoring the files, without requiring them to be downloaded again.

Actual behavior

• The downloaded video files still exist in the restored folder.
• The Download Manager does not display them.

Questions

1. Is there a way to make the Download Manager rescan or reindex existing downloaded videos?
2. Does the Download Manager store download metadata or a database outside the Documents folder?
3. Is there a way to manually import existing downloads without downloading everything again?

Version

YouTubePlus_21.42.4_6.0b2

Any guidance on restoring existing downloads would be appreciated. Thank you!