Yeah, definitely a bit of drift. Pretty roundarm too, that could help. Yeah, I noticed the ball seemed to stay pretty low there - maybe a lot of sidespin?I tried to post a longer video but there are file size limits here. I will try and make a couple more, including one of my flipper, but it's a ballache process!
That GIF is pretty representative of my stock ball, although it would usually be a little bit fuller and have more bounce. The camera is between middle and off. I think there is a bit of drift, from where the ball is released from my hand to where it pitches there is some movement I think.
I've got a few older-ish videos of me bowling, gonna upload in a bit. I was bowling pretty bad that day, from a few months ago I think. Then I guess after uploading this one when I film a new one and upload it I can see how I've improved.