The best pieces for blitz are triple weighted Ultimate chess pieces V3 (in the video he showed the V2), but I think these weighted gambit pieces would work ok in a blitz or bullet game even tho they don't have the biggest heads which is good for blitz and bullet. If you want to play bliz, you will need a different type of board, I would recommend mousepad type mat, because he ordered a silicone mat and on silicone mats you can't slide pieces smoothly. You can't slide them in general. I hope this helps😁
