Why my cinema app has a sprinkler thing on the screen?
I'm assuming you have Cinema Pro open in total darkness (or face flat on a table)? I've just opened Cinema Pro in our darkroom using the same settings as you had and I get the same thing but only at a high ISO. So yes, I would say it's normal. It doesn't cause any issues under normal usage.
On my testing, the sparkles only appeared at ISO 500 upwards and 360 degree shutter (even during recording) and only using the 16mm lens. Screen also showed a strange moire pattern, The pic below shows the pattern, I've lowered the ISO to make it easier to see.
However, in order for me to get the sparkles to show, I had to start Cinema Pro with the lens covered so there was no light entering the camera, set to high ISO, 360 degree shutter then uncover the lens which in most cases gives a terribly over exposed image. Making those settings under normal use, ie in natural light, no sparkles appear.
For me though, it only happens when selecting n/a for the Look. Simply switching to a different Look and the sparkles / Moire pattern disappear, even if I go back to the n/a Look.
