Ah I see, that's different, whipping into the ball vs slapping at the ball. My apologies for misunderstanding you. You'd be right that I didn't do any whipping or very little windshield wiper action here, and for two reasons: 1) The opponent I was playing against could barely handle my regular, medium paced shots, of which I was mainly focused on good depth and consistency. The extra spin and pace I could inject by whipping into the ball would have made it almost impossible for him to get the ball back into play--it is a warm-up after all, and 2) I shank a lot when I go for whippy shots against weaker hitters unless I'm warmed up properly and am in a rhythm with better footwork, which typically is only achieved against stronger players. That's the bigger excuse, I couldn't get grooved enough to hit the shots I wanted. It's actually another thing I need to work on, hitting with controlled power and swing speed, even against junk balls without going for too much.
And in regards to the right foot (or left foot coming forward), it really depends on the stance and how much weight I'm wanting or am able to put into it. I'm not going for my shots in full force at any time during that video so not once was my full weight being utilized. Even during the match I just moved the ball around because I figured beforehand that's all I would need to do, and I was right. Many times I was just looking to recover right away, sometimes even before I'd completed the followthrough properly because I knew how wild (or crafty) my opponent could be when redirecting balls and since I wasn't looking to hit winners, that meant I had to compensate somehow to keep the rally going. It was either that, or hit winners/unreturnables, which to me, makes no sense to go for when you're warming up. I did go for a couple short ones, but only because he tried to against me the points prior, unsuccessfully.