Here is a recommended list of freely available videos about kayaking skills:
Kayak Rolling Videos
The following videos by Chris Spelius are a great free resource about rolling:
Kayak Rolling Overview
Common Threads of Kayak Rolling
C to C Roll Identifier
Back Deck Sweep Roll Identifier
Back Deck Rodeo Roll Identifier
Hybrid Roll Identifier
White Water Technique
Dr Throwline How to use a throwline. Useful safety video.
Not many videos but a great free learning resource:
Surf Kayak Skills
Paddlers with a Slalom background tend to have best the best paddling technique and it helps with most other types of Paddling. Good detail and each section includes short video clips.
Slalom Technique and Training