Some good suggestions here, the image staying there can be quite annoying, it's possible to delete the image from the post (I've now done it on this one - that's why you can't see the player anymore) but @peakd and hive.blog both perform image caching on posts in order to save costs, and there isn't a practical way for us to tell them which posts to clear their cache for.

We can't implement looping unfortunately - not because it isn't possible but because it could be abused.