I was on you tube today just browsing when i came across a clip of a diver showing boyancy and trim. The clip was very good and explained why its important, but the actual diver demonstrating this was fantastic. Boyancy was perfect even moving and spinning around, I had to watch it twice it was great.
Also found the new Padi Divemaster and instructor demonstrations. It was very good to watch with clear footage and easy to watch. Mainly for new divers but much better than the old padi version with the dodgie guy diving getting sunburned.
It covered all aspects from kitting up to underwater skills. Good for a reminder if not dived for a while.