Upload video from external link

So I'm building this video conference app (ASP.NET) hooked to the jitsi meet platform (https://jaas.8x8.vc/), which allows the Moderator to record the current conference and save it on jitsi's cloud. Through a webhook the moderator is able to get the downloadurl for this video, but since it only remains active for 24 hours, he has to download it to his computer if he wants to be able to access it in the future. Then, in order to share this video, he would have to upload it to the cloud again (DropBox?) and provide a download link. 
Now, it would be useful if the video could be uploaded directly to dropbox, providing the original downloadurl through the dropbox api, then grab the resulting final download link and display it in the app, so the conference attendees may review the conference in the future (stream it from dropbox, rather than downloading it first then view). I've seen elsewhere that there used to be a save-url endpoint (api V1) but couldn't find anything related in the current api. Would appreciate if the community could enlighten me a bit about how to achieve this. Please note that the jitsi conference interface has an option to directly record the conference to the moderator's dropbox account, but he would still have to manually provide the final link afterward. I just want to avoid this extra step for the moderator and have the final link become automatically available in the app (after the upload to dropbox is concluded).