How to get a list of videos from a local video archive that are deleted online by now?

[bathrobehero]

Checklist

• I've verified and I assure that I'm running youtube-dl 2018.12.17
• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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Description of your issue, suggested solution and other information

This is hard to search for so I apologize for asking here.

I have both youtube channels and playlists with thousands of videos archived and I want to get a list of videos that are deleted from youtube by now but I do have the backups for. I use only the title as the filename and store the json and the thumbnail as well. Is there some built-in method for easily generating a list of these files with youtube-dl, or do I have to work with "has already been downloaded and merged" entries and comapred that to a file list (not very convenient)? Thanks.

[rautamiekka]

Well, if everything else fails, you could

1. get the IDs from the JSONs
2. use a link like

https://www.youtube.com/oembed?format=json&url=https://www.youtube.com/watch?v=vqnVqmeSVp

to get either

1. Not Found if the vid doesn't exist
2. otherwise its JSON.

Cuz the filename alone is totally useless.