Add your own crawling text and background footage for an authentic news room or on-the-scene reporting look and feel. Includes alpha (luma matte) and is loop-able. (To ensure proper looping split the clip into two clips, firstly RGB and the other alpha and loop each of these separately. then set the luma clip as a luma matte on the RGB clip)

Tutorial over here: http://93films.blogspot.com/2012/04/how-to-use-alpha-mask-embedded-in-stock.html