We've used Zoom for a year or two. They offer 1 Gb online storage that is convenient for sending out links to team members who miss a meeting. But some of their meetings run to 850 Mb each, which means I'm always overflowing the limit even though I don't leave a meeting up for more than a week.
So I asked about buying additional storage. The answer was that the first additional step was all the way to 100 Gb at $40/month when the basic video package was only $15/month. That's ridiculous!
Jitsi is open source. One can easily implement at their own premises. It offers live streaming thru which one can stream to you tube live. No hassles of storage. Another option is to deliver the lecture and store at local device cloud (open cloud) and share the link to the end users who requires to use the resources
You can automate uploading the files to whatever file storage platform you're already using like Dropbox, Google drive or better yet Firebase or AWS. Then delete the files from Zoom after they are uploaded. You might be able to accomplish this with Zapier. If not, we develop these kinds of custom automations at TinyApp.io