Exporting video with a transparent background

I’ve seen several discussions on exporting transparent videos here, but I still don’t understand if it can be done, and if so how. I set the background of the document to be transparent, and add the CSS to have a transparent body, but it seems that the scene has a white background so the exports always have a white background. Ultimately I’m interested in exporting a video, which I don’t think is directly supported yet, although this should in theory be possible at least through PNG export. Is there a way to do it now? If so how? Thanks.

this is the current state …

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I share it here too because I think it will be more visible: micro tutorial to explain how to export animations with transparent background and incorporate them into a video editor.


Any easier way to do this now many years later?

If you are importing into video editing software, you could use an awful green color as your chromakey:

It is 2023 now. Any option to do this easier already?

There's nothing to comment on/report on the app side - the recommended method is still to do a PNG Sequence export with 'Make background transparent' in the Document Inspector turned on, and then use other software to stitch together the PNGs to a video.

Note that mp4 video does not support alpha channels. The good news is that HEVC video does, so this would be what a future Hype option would support.