Video Narrator - transparent background problem in Storyline
I have paid someone to key out the background of a green screen test video I made of a presenter so I could demonstrate it to a potential client. The providers I have used (I have received a few examples) all swear blind they have included the alpha channel, and it is set as transparent. I have various file formats including .flv, .mov and .avi.
When I insert them in to Storyline, the background shows up blank, and stays that way even in a preview.
Is there a problem with inserting alpha channel transparent videos and maintaining the transparency? Or is it a setting I have missed?
Thanks for any help.