Chick - are you truely not running a low dosage of test and/or GH? (And have not done so, in say the last 6 months?) Not that I am doubting you, but like a few people have commented, your arms in that recent vid do look pretty impressive.
OK, and now a second question - be honest! Did you give your arms a bit of a pump up and deliberately flex them for the vid? (Again, nothing wrong with that, but just curious!)
Lastly, you look a bit leaner that you have done in pics/vids over the last few years, where dare I say it you looked bit chubby. Have you been dieting or doing a bit more aerobic work?