There is a page hosting a video on a third-party unpopular video host. There is no access to edit the page, it is a third-party CRM-system. I can only add some code to the head or body.
When the video viewer ends, the browser sends a POST request inside the system where the video lies, which conveys the fact that the particular video has been viewed.
Is there any way to track this request being sent in the background in order to do the action I want (e.g. send a notification to my manager)?