I am currently trying to export a animation with a transparent background to lay over the beginning of my YouTube videos. I got this idea from the famous YouTuber captainSparklez. I have tried changing the output to RGBA but that does not work and I have also tried selecting transparent in the film section but that doesn't work either. keep in mind I am using Cycles to do this and I don't know if u can render a QuickTime animation in cycles. I will be using this in my editor Adobe Primer Pro if you need to know that. My version of blender I am using is Blender 2.78a If you could help that would be amazing thank you for your time.
Just render it out as a PNG sequence (with alpha) then take those files into Premiere as a sequence.
In your render settings tab, make sure your dimensions/frame rate are correct.
in the output dropdown make sure you set a destination place, and make sure PNG is selected with alpha
Make sure you hit animation and NOT render when you are ready to render out all your frames.
In Premiere make sure you click "image sequence" when bringing in your files.