I take it you are talking about Alamdv2 Plugins?
If not, than the rest of this is completely worthless...
If so than they are "Image streams." Essentially they are just a series of pictures that when you put into your software, (for you, effects lab) by "importing an image stream" in the media section after downloading them from this site. At which point you find the folder and click on "open" or something like that and it will import the "image stream" as a video, (playing the images in a sequence) that you can put over your videos.
This is how you do it on a PC but it can't be much different on a Mac.
Hope this helps! Have a wonderful day/night!