Final download URLs are only guaranteed to work on the same machine/IP where extracted. More on this.
UPD:
To get rid of 403 remove the cache by running youtube-dl --rm-cache-dir on behalf of www-data.
Final download URLs are only guaranteed to work on the same machine/IP where extracted. More on this.
UPD:
To get rid of 403 remove the cache by running youtube-dl --rm-cache-dir on behalf of www-data.