You may have noticed there are video glitches in my most recent videos. The issues started (possibly coincidentally) at the same time I upgraded to an iPhone 11 - which I use for many of my video shots. Interestingly, only iPhone footage seems to be affected as anything I record via another source, like with a GoPro, doesn't have a problem. The issue appears to be with the iPhone footage imported into iMovie. I have been running laps with Apple support in hopes of finding a resolution.
Rest assured...If Apple can't provide a timely fix I will switch to a different platform/computer - whatever it takes to be able to deliver content without video artifacts and issues.