--prefer-free-formats
# -f "bestvideo[height<=?720]+bestaudio"
-f "bestvideo[height<=?720]"
--embed-subs
-o ~/vid/web/%(title)s-%(id)s.%(ext)s
--add-metadata
--user-agent "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"