Completion & Points for pages that have media embedded

From an email:

“Can you remind me how long I need to be on a page for it to register as a completed activity? I’ve been working my way through the Liberia Digital Health Basics course and I’m getting points for watching the video, but even if I stay on the page for 30 seconds or more, when I click to the next activity I’m not getting credit for completing the one I’m on. If I navigate back to the course activity list, then open the same activity and stay on the page for 10 seconds (I have this in my head as the amount of time required to signal completion) without watching the video, then click to another activity, I do receive credit for completing the activity. Do you have any idea what might be going on?”

@jjoseba - please can you have a look at this?

Cheers,
Alex