The name at the top of the vid didn't give it away??

Yes, that's him.
The voice in the video is Jimmy Walker, who paddled for Australia at the Games and is a current NSWIS kayaking coach and runs a training grouop called Jimsquad.
As part of buying a kayak or ski from Quantum Kayaks, we run training days for our customers where you come along with your craft on prearranged days and Jimmy will help everyone on their technique and how to get the best out of their paddling.
These days are free of charge to our customers and are open to everyone who paddles a Think Kayaks ski or a Quantum Kayaks boat.
We have a new delivery of skis in the next few weeks, so will have a training day arranged straight after that. Drop me a line if you want details.