Transparent background for an animation

Is there a way make an animation in cycles that has a transparent background. It tried to render each frame with a transparent background to see if that would work but instead it can up black once it had rendered. Can anyone suggest anything? Attached is the setting used to render it and the first frame.

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I would like to know too. I don’t think videos with alpha channel exist.
What I do is to transform those PNG Frames into a GIF through GIMP. It works fine, but the filesize is bigger.

OKay Nadeox1 once I have downloaded GIMP how do I change it from PNG to GIF?

You can’t add gif images so how do you do that?