I tried to link this av, but an error is displayed

[arakawa995]

Checklist

• [ check] I'm reporting a broken site support
• [check ] I've verified that I'm running youtube-dl version 2020.09.20
• [ check] I've checked that all provided URLs are alive and playable in a browser
• [ check] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [check ] I've searched the bugtracker for similar issues including closed ones

Verbose log

G:\downloads\youtube-dl>youtube-dl https://m.thisav.com/c802bab3-14ed-4ecc-ba00-a199c5f56a6d
[generic] c802bab3-14ed-4ecc-ba00-a199c5f56a6d: Requesting header
[redirect] Following redirect to https://m.thisav.com/error404
[generic] error404: Requesting header
WARNING: Falling back on generic information extractor.
[generic] error404: Downloading webpage
[generic] error404: Extracting information
ERROR: Unsupported URL: https://m.thisav.com/error404

-->

https://m.thisav.com/video/510323/　
I checked the version of the above URL, but I couldn't download it.

Description

WRITE DESCRIPTION HERE
I confirmed that the THIS AV site could be downloaded from the list in the support column, but I could not execute it successfully. I want you to improve and fix it somehow.