Hi again…
It is possible to post link to Blizzard sites, for example, and for the “regulars” here it is also possible to post links to external sites. If you would like to know more about that privilege, take a look at “Trust Levels” in New Forum Guide - Syntax & Features
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Your link points to a MP4 movie.
I know that YouTube movies seem to be allowed.
Although I haven’t done that yet. I’ve seen many people post YouTube video clips.
For your next post on the forums, I suppose 
Best of luck in your games !