This suggests the screenshot was taken specifically while the YouTube app was open.

: Type "YouTube" in the Google Photos search bar. The app often uses metadata to group screenshots by the application they were taken in.

The "com.google.android.youtube" part of the filename is the for the YouTube app.

If your missing item is archived, unarchive it to make it visible again in your Google Photos library. Learn how to check archive. Google Help How To Take A Screenshot On Android

Most Android phones use a dedicated "Screenshots" folder. You can search for the specific file name using a file manager.

: If you think it was deleted, check the Trash in Google Photos . Deleted items are usually kept for 60 days if backed up, or 30 days if not. 3. Identify the File Source

: Open the photo in Google Photos, tap the three dots (More), and select Download to save it to your current device. I want to my recovery screenshot photo trash - Google Help