2.mp4 — 1

Scripts or tools used to download YouTube playlists often default to numbering systems like 001-video.mp4 . If the metadata is missing, the script might just leave you with the numbers.

Programs like Shotcut or Adobe Premiere often use sequential numbering when exporting multiple clips. If a naming template fails, you might end up with 1.mp4 , 2.mp4 , or the merged 1 2.mp4 . 1 2.MP4

To get your files back in order, follow these best practices for video file naming : Scripts or tools used to download YouTube playlists