I'll check out the mobile app display in the UK morning. As I understand it from that tracker issue, although the course summary does have a rich text editor allowing for images, media (and these will display on the front page course list) when you look at the course overview in the centre of the dashboard, that display is plain text and hence you don't see images or videos, and that was a deliberate decision.
Courses and course formats
Course overview: Issues with video embed from summary.
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