Really tricky, and I dont recommend them unless one is confident with isolations, otherwise they look quite ugly.
The essence of hybrid moves is to play an isolation with one, and an extension with the other hand.
In an isolation your hand is spinning Opposite to the Poi-head - and in an extension your hand is spinning With the Poi-head -> So with hybrid moves: If you spin your hands sametime the Poi swing splittime and the other way round.
Try this: Wheel-plane. Shorten only one Poi and play an extension (bigger circle) - play an isolation with the other hand. Hands sametime

Once one gets the feeling all moves are possible this way. I recommend starting with 3beat weaves.
andy