I do sort of stitch them five seconds at a time and then speed it up, but in origin it is performed with a full 88-key synthesizer with the sequencer built in. I have been known to perform them all the way through a bit later, but not everything in my catalogue works for that necessarily.
Gratified that you would enjoy a video but at this stage i'm kind of a recluse with not the best internet connection.
I might consider doing videos down the road though.
Cheers!