STI Checking Extractor Tension (video)
STI How to Adjust Trigger Over-Travel (video)
Tuning your Pistol for Faster Double Taps with Recoil Springs (video)
Dave Dawson DVD on Disassembly and Assembly ($19.99) BUY ONE!!!!! [ link ]
    Check out the other videos on the sight like Magazine Tuning Kit, and other instructional videos.
1911 Re-Assembly Part1 (video)
38 Super Cleaning (video) [ Some good points and the reason for frequent cleaning ]