Alpha channel codec on windows

I have a wirecast gear windows machine. I have lots of graphics with alpha channels that I’m using on our show. I’ve found that prores 4444 doesn’t play well so I switched all of our graphics to quicktime animation codec. It’s better but still bogs down on playback. Is there a better video codec with alpha channel I can use for this windows machine? Kinda frustrated because we purchased the best machine wirecast could build and we are still having a hard time with these files. 

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