Thank you! I have the same settings. I think it's the server's settings who might cause this problem...I will contact them...

Send me a url so I can take a look as well.

Here is a feed from my website eobserver.co.uk/ellada?format=feed . It has an article with a video in it (although I don't think it is inserted with AllVideos)

From what I can see videos are present in your feeds
eobserver.co.uk/ellada?start=45&format=feed
(check the iframes).

I did not find an item with a K2 video to crosscheck.

The link you send me shows nothing (my feed shows only 10 items). The server has nothing to do with the issue. All the items are k2 and the iframes are inserted via the editor. I don't know what else to check...

What I sent you is an example that videos DO appear on your feed.
Once the feed is parsed and displayed somewhere else the videos WILL appear.

If you insert your videos through the Media tab your feed will also have the <video> element in the feed.

So videos DO appear on your feed.