How to export/share to a format with alpha channel ?

Hi there,
I have a video clip recorded in greenscreen.
I have applied some keyer effects & the background is now excellent bcos it is transparent.
But when I export it, the resultant file shows the back as a solid color, it ain't transparent anymore !
How do I get a file with the background transparent ?
Thank you

Tom Wolsky wrote:
Export Movie and set the codec to ProRes 4444.
ThanksTom, it worked !
Really appreciate it !
Btw, just a matter of interest, what dooes those numbers mean ?
Cheers

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How to export/share to a format with alpha channel ?

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