Exporting a Giff in Figma to MOV format

I desperately need help with exporting into .mov format from figma pro.
I am designing instagram posts for a client, some being moving giffs in instagram frames with still graphics on top.
I cannot for the life of me export them as movs (instagrams only video format).
I need it to be user friendly for the client when i hand it over to her - so she can upload new videos and download them herself to create her own posts.
Has anyone got any tips for this? Thanks!! Sarah x

for context - i am currently having to export the posts as giffs, and use a video editing software to change them to mov format… not sustainable :frowning: