Hope everyone is safe. I have created this small test animation. A clean raptor and a HDRi in the scene that's it. https://www.dropbox.com/s/c8dvulisy02nfs9/0001-0060.mp4?dl=1
As you can see i have those strange sparkles, artifacts on the skin and eyes. I thought it was the denoiser but when i test without i have the same issue. I use cycle , 128 samples render + motion blur. I go to png first then mp4. But already when i play the PNG i have the issue. I have this issue in all my animations! Thanks for your help! Cheers