Added more options

Hello.
First I would like to thank you for your app. 
I prefer to use cli, and this app saved me from using web browsers to play youtube videos.

I forked your app to add some functionality I needed : 
    continuous playback, 
    don't display video and 
    add search term as argument.

If you find it useful and if I didn't break anything (or introduced bugs) I would be honored if you could integrate my changes to your app.


Sincerely,

Luka