You may have heard late last month YouTube announced it would allow content owners to include their own customizable overlay links on their YouTube videos for the first time.  Note this is different than the overlays which content owners could previously opt to place on their videos that allowed YouTube to target which links appeared.  The big disadvantage of that program for online retailers was that e-commerce companies don’t benefit by allowing 3rd parties to advertise in their videos – the last thing anyone wants is to use a video that consumed precious resources to…