youtube-dl --skip-download --write-all-thumbnails -o "%(uploader)s/%(upload_date)s - %(title)s - %(uploader)s - %(id)s.%(ext)s" -i "https://www.youtube.com/channel/UCFFH1T9H5J7lAr4tkhjoVmw";

426x240
640x360
854x480
1280x720
1920x1080

動画の高さ360以下の動画
youtube-dl -f "bestvideo[height<=360]+bestaudio/best[height<=360]" -i
480以上の動画
youtube-dl -f "bestvideo[height>=480]+bestaudio/best[height>=480]" -i