问题
In the top left corner of a youtube playlist embed there is a button to open the playlist menu. I'm trying to have this list opened programatically in the page load. Is there a way to accomplish that?
I think this can be accomplished with contentWindow.postMessage but I have no idea what function to use. I could not find any documentation.
Playlist embed code:
https://www.youtube.com/embed/NU1rsLIdpNA?list=PLdIivvLumeIVQHwOsZLYqp3-LZ75X1WKO
来源：https://stackoverflow.com/questions/39104339/show-playlist-menu-in-youtube-embed