Downloaded Stock Video (From Animation Kit) won't import to DaVinci Resolve

Does anyone know why Downloaded Stock Video (From an Animation Kit) won’t import to DaVinci Resolve. The Animation Kit comes as a Zip file with a library of a variety of animations (important to note that these are all alpha channel.) These cannot be imported to Davinci Resolve for some reason. Is this a codec issue? Is there a remedy for this so that I can import these animations into DaVinci Resolve? Thanks in advance for any advise.