Say your watching a ball review video of someone that's right handed. For some reason some reviews with flip the image and do a mirror so it looks like they are left handed so you can get a look at what it look like from the left side. Its makes absolutely no sense to me. Its still a right handed reaction and its still the right side of the lane. Am I alone on this???

Example:

As someone who bowls left and right handed, the lanes do react differently on each side. Flipping the image doesn’t show how the opposite side will react, but what it does do is show how the ball transitions for those that don’t have an eye for the motion when it is on the opposite side. A lot of right handers can’t watch a lefty throw a ball and know much more than “that hooked too much” because they aren’t use to reading motion on that side. I assume it is the same for lefties. But flipping the image let’s them see it from that perspective, although the motion will probably be a bit cleaner and sharper if a lefty actually threw the ball.

I'm with possum, I bowl both and there's a clear difference between both sides of the lane, but for some people it's easier to conceptualize when they see it from another side.  Reactions look close enough on a video that it's more about the idea and not so much the details.