Hardware Specifications for Self-Hosted Jitsi Server

I want to deploy a Jitsi Server at Digital Ocean(say).

Case 1: I have a requirement of having one video conference with 10 - 12 panelists talking for an hour but participants having muted their video and audio. I expect about 1000 - 1500 participants, so how much could be the minimum server hardware requirements to accomplish the above??(Assume there can be max 18 concurrent users streaming video)

This could also be streamed to YouTube concurrently.

Case 2: I will have 3 - 4 concurrent separate meetings going on with 12 - 15 participants with their video and audio streamed for everyone to see, so in total a max of 60 video streams and concurrently saving the recording to Dropbox. So how much could be the minimum server hardware requirements to accomplish the above??

PS: I tried to google stuff but had no luck.

My guest for case 2:
CPU-Optimized Droplets, 16vCPUs, 32GB

the same will work for the case 1 right, since only 18 people at max are going to stream the video, others are just participants??

No, it’s really different and I have no idea.