Video progress tracking

[kronnox]

AEMaaCS has instrumentation to track the progress of videos. Not sure if we are able to add that functionality without changing Launch rules.

[kronnox]

Not as easy as it seems. Current findings:

• https://git.corp.adobe.com/jagraham/extension-core/blob/master/src/lib/events/mediaTimePlayed.js
• Adobe core uses the 'timeupdate' JS event to track media progress.
• Since we embed the video as an iframe from a different origin, I don't think there's a way to access the 'timeupdate' event.
• Possible solution: Use the Wista API to handle the 'timechange' event and trigger a 'timeupdate' event on the root document / container.
• Another possible solution: Just get rid of the iframe and embed the video using the async Wista API. Probably the better way to do it anyway. Reference: https://docs.wistia.com/docs/embed-options-and-plugins#setting-options-on-standard-and-popover-embeds