I’ll try to find or make a better quality video than this. The content is good but the picture is a bit fuzzy. I think some close up pictures of the grip would be useful as well. I would recommend sticking with the first all-purpose grip demonstrated until you have gained some experience and proficiency and then, if you wish, experiment with the other grips which, according to the video, allow you to hit harder and flatter. This is a Canadian coach and I suspect he is also a US racquetball player. The US version is played on a larger court with the emphasis on hard hitting. Hard hitting has a place in the UK game but the emphasis is more on accuracy and variation.