Does Elderberry Syrup Work?

It seems like EVERYONE I know has been sick or is sick now.  Personally, I haven't felt like I have been at 100% for the past couple weeks.  Normally, I don't do anything for a cold or the flu.  I just deal with it.

But, in an attempt to get any relief I've resorted to doing shots of elderberry syrup.

What is it?  Does it work?  How does it work?

This video offers up a pretty good explanation