brew-bundle: update usage info and move to --help function

Follow-up to 6697ff6c9d0d4301adfbb7c76628808a63f1324b

Closes #25130.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
youtube-dl 2013.12.11.2

Closes #25139.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
ffmpeg: don't apply patch to HEAD

Fixes #25134.