Nice video but im not real sure about flying so close to those gliders that seems dangerous and irresponsible to me. Only takes one mistake on either your behalf or a wrong turn from one of those guys and your putting their lives at great risk.  Can just imagine what a mess a drone would make if it were to get caught up in one of those canopies.
There are reasons why we have no drone fly zones and that should be one of them.

The video looks great! But does it come from the original video in SD card?  

Great video!
Did you coordinate with the gliders to ensure deconfliction?  Did they even know you were there?

Nice view of what the hang gliders see!

Beautiful footage. But very scary with these gliders so close.

It was not that close. They flew out in the ocean. I'm way in land.

Good job!