I like your "double switch hands" at 0.4 - 0.8. IMO, that's the highest level technique in the striking art. You have to be very good to understand and demo this technique. Great job!
Here is the definition of "double switch hand". It came from the Bagua system. I don't know if you use the same term or not.
- You attack with right hand.
- your opponent blocks with his left hand.
- You use left hand to re-block his left hand block, free your right hand, and continue attack with your right hand (so far you are using "single switch hand").
- Your opponent blocks with this right hand.
- When his right hand expose his center, You attack with your left hand.
https://www.youtube.com/watch?v=hHlzjDWPsAE