Hey there @lowtidefy,
Granted, I don’t follow every single Sonic Pi related blog or video channel, so I might miss something, but as far as I know, there aren’t really any in-depth videos or tutorials specifically aimed at teaching Sonic Pi live performance techniques, aside from the few sections in the official Sonic Pi tutorial.
There are topics elsewhere on this forum that describe various helpful techniques - for example:
Something that may be of interest: there’s talk between several folks and I of the possibility early next year of putting together a ‘live coding with Sonic Pi’ video course. If that ends up happening, including a video about live performance techniques sounds like a good idea. We’ll share more if/when the plan comes together 
In the mean time, you definitely have the right idea by watching others live coding, and keeping up the practice. These are definitely the most helpful in the absence of thorough teaching material