Tag Associated Records is for working with businesses or groups that may have multiple contacts associated with them. For example, you work with 5 people who are all part of a single organization, and you want all 5 of those people to move through a funnel together.
Video Triggers will tag contacts based on the amount of time the contact has viewed your Wistia, Vimeo or Youtube video. By applying tags at strategic points in a video, you can trigger important follow-up with those contacts.
Video Triggers will tag contacts based on the amount of time the contact has viewed your Youtube playlist. By applying tags at strategic points in a video, you can trigger important follow-up with those contacts.