I am actually back part-time, if anybody has actually realised I left :p
If you want help with setting up autoplaying embeds, Click the link(s) below:
*Please note my guide was written before the new youtube layout. Therefore some stages have changed slightly and my guide will require alteration. In the mean time, the only big change is that you no longer click the blue 'gear' to access the embed features. Please use the youtube's - "embed" button instead.