Media in Maian Weblog

I was wondering if it is possible to use your own video material in Maian Weblog.

I know there are options for Youtube and Vimeo et al, but I tried my hand at a video I saw on Facebook.
Entering the url in  tags just opened the video in a new tab on Facebook, and then I downloaded the video as an mp4, made a folder called media in Maian Weblog and uploaded the video there.

I then put a link to the video down in my post () and I got this:

So, any further possibilities, please?