For a brief period earlier this year, the trailer for Master of Dark Shadows was available to view on YouTube.
I presume that must have been the same as what I noticed back in April was being heralded on MPI's streaming Web site as an "Exclusive first look at the upcoming Dark Shadows feature documentary". I don't subscribe to the service, so I've never seen it. However, soon after I posted about it, Gothick posted that by the time he'd read about how it was also available on YouTube, it had already been taken down.
Though the good thing to keep in mind here is how you say:
Most of the clips were about DS or showed DS stars