I... sort of agree with you. It's generally desirable to make your products acceptable to everyone you can, and so the decision to include a pentagram is probably poorly calculated.
But on the other hand, the sort of people who would put a cross symbol in the corner of a video are probably for-real fundies, while it's obviously extremely unlikely that anyone involved in the making of this video is a for-real Satanist (in the religious sense of the term). So I think there might be some justification for differential treatment on the basis of this context.
