I don't think that Darkcoin can be explained in a 1.5 - 3 minute video. 
Contrary to the Bitcoin video, Darkcoin would need more in-depth-explaining.
WHY is anonymity better than transparency?
WHY is a transaction time of 10 sec better than 10 min?
The role masternodes play in all of this...
What is Darksend, etc... 
We have so many additional things we would have to explain ON TOP of the basic cryptocurrency principle.
So it really matters if you want to see a video that speaks to people who already own cryptocurrencies, or a video that speaks to complete newbies...
Two different things!