Ok - this might be a longer chat and I would need to know much more about your current landscape, but....
The three platforms use different ideas of de-anonymizing, however, since you want to know the Target Account I would:
- 1.
Create a Custom Event in Google Tag Manager for Wistia, capture it in HockeyStack and define a goal
- 2.
Ignore anonymous and use reverse IP to get to the Account/Company level