I have been using the standard Moodle essay question with each question showing a video clip and the student is asked to answer a question to describe what they see. The essay questions are built into a quiz so the sequence is fixed and navigation is to the next page. The sequence is important as each question reveals the story line.
The H5P essay will allow automatic marking but it is an activity. Ensuring sequential flow and and a natural progression while preventing students wandering off to new areas from an activity are not clear.
The H5P activities are individually cool so how do you package them so you don't end up with a long list of activities?