I've always wondered how to do this. Thanks for a very clear video. When I was younger the family inherited a Collard and Collard Boudoir Grand Piano. On moving the movers dropped it on a tile floor breaking the tiles. The piano was undamaged. When the legs were attached, screw thread at the top, the piano had a worrying shake. Wrong legs in wrong holes. If you come across this again then my suggestion is to number the legs so they are put back into the right holes. I guess this is not too common now!! It provided for a few years of worry though.
Pretty good but i would wrap the whole piano with blankets and either shrink wrap it or use straps (non ratcheting) to hold it all together then on a grand board then a dolly with pneumatic wheels
I wonder if you have any advice for a piano a little like you have in the background, with two legs each side at the front, a strut between each of them, but unlike yours there's also a cross-member the width of the piano between the struts. So it resembles a dining table structure at the front end. (It's a 1900 Broadwood boudoir grand). I can't quite think how to approach this one! (My backup plan is to prop both sides and remove both front legs and the cross-member at the same time.)