Are there any apps or tools that allow visualizing multitouch finger positions for iOS screencast/recording?
I needed the same and searched a lot. In my opinion there are three solutions:


Live capture of the gestures one does on your iPad (not professional)
Using a PNG of a pointing arm (hand) in ScreenFlow (or Camtasia).

This works quite well. One can tweak the png a bit (X,Y,Z-coordinates) and with adding video actions it comes to live. It is elaborate though, but with some patience and expertise quite professional.
Buying a M4A or MOV of finger gestures.

Have a look at VideoHive's Touch Screen Finger Gestures for example.

You can purchase them with an alpha channel to incorporate in the screencast. Didn't try that one, but seems the most professional to me. Some costs involved though.