Yes, you can use any file sharing platform (such as Google Drive, Dropbox, OneDrive, Box, etc.) as long as you grant us the access to download the files and download speeds are not too limited.
We still recommend using Space to upload your footage directly to our server, however if you already have your footage stored somewhere, it makes no sense for you to upload it again to Space.
You can also give us the links to your videos at YouTube, Vimeo, TikTok, Facebook. Make sure these videos are public and not in a secret/private group. If these are public, your editor will be able to download them using a third party software.