I had a bad experience with campaigns. It seems to be a waste of money. I targeted mine very specifically to its audience and all I received was "Real" Views. I didn't get a single thumbs up or Thumbs down or a single comment. They might as well be selling me fake views. On top of that minutes watched was about the length of time of someone watching the video once.
I was referring to running a Google Ads campaign.Are you talking about YouTube or PPC? Seems odd if it was PPC that your primary KPI would be engagement with a video vs. phone calls, lead forms, etc.