guess the tune HD 720p

Hi can you guess what I'm playing too?
If you can make to the end I give it away as I start to well sing... my enthusiasm got to me.
However I may do more if you like this.
Also when and if you figure it out... well you could play along with it...:)
I'll check comments and give answer to those that play.
Thanks
Oh and if this is successful ... well perhaps prizes for those that goes correctly but perhaps a long way of from that as well I start with 2 very important subs ... lol