The youtube videos of fastish knitting that I am always fascinated to watch are those that demonstrate knitting methods that I don't usually see or read about.
I hope to try them sometime even if they don't end up increasing my speed because I think that if I could get the hang of it I could switch back and forth between my usual continental and something else if my hands get tired or something.
Here are a few I find myself looking up from time to time to gawk:
I have only tried the around the neck alternative, but did not master it enough to pick up speed, though on a purl row I could do it as
fast as my normal continental speed.
Watching speedy knitters though reminds me that I am new enough to knitting that it is my brain that needs to speed up and not my fingers. I can type at 60+wpm so I know my fingers work, but I still have to pay attention to any stitch pattern that is more complicated than stockinette. Even when knitting 1x1 rib I find I have to tink a bit here and there if I let my mind wander. I know that will improve with more practice.