I do not quite understand what you need. Why would you need a server to upload files to your LMS?
Did you mean that you want to store media files for your courses on a 3rd party server, while other Lectora course files are stored on your LMS? If so, you have a million options like:
etc etc etc, just look for “enterprise video hosting” online.
Or if you don’t need streaming and re-encoding and just need to put the files somewhere, look at Amazon AWS / S3.
Like Irene, I want to use Streaming Video in my courses. I am testing Azure Media Services but having problems. When I select Insert > Video > Streaming Video and select Windows Media Services from the drop down, then preview is not available and when I go to Preview mode (bottom bar), preview says “missing plugin”.