Other people have commented on the use of beta blockers, and I've heard of professional musicians using them to calm their nerves. I refuse medication at nearly all costs, partly because they always have side effects. But also drugs divorce you from your body and emotions. There's a reason why we evolved to feel pain, it's for our own good, even if it's, well, painful. I also agree with many of the others on this thread, I can barely detect your nervousness in your vids.