It’s not a single product. The entire concept is rotten to the core…
I think Vimeo has resumable uploads, like YouTube, so even if the connection goes away the browser will keep retrying.
BTW, if you are interested even Vimeo has ftp, so if you are into crazy server setups you could upload the video to your vps and have it upload both to Vimeo and Podbean.
We have very shitty internet here in Italy and this is our solution.