On Fri, 31 Jan 2025, Jeffrey Walton wrote: > It is bookworm-backports, not debian-backports. See > <https://wiki.debian.org/SourcesList>.
My error, I corrected my sources.list. Command apt update then ran correctly, and command root@maria ~ apt -t bookworm-backports install yt-dlp youtubedl-gui installed yt-dlp 2025.01.26-1~bpo12+1. Thanks, Roger