[docs] Added some missing YouTube functions to the documentation
[docs] Added some missing YouTube functions to the documentation

Pecisk/libgdata,GNOME/libgdata,Distrotech/libgdata,pwithnall/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata-gtasks,Distrotech/libgdata,Distrotech/libgdata,pwithnall/libgdata,Pecisk/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata