That video is mostly wrong (and I made a Starlink Reality Check video so I'm hardly a fanboy).
Can you elaborate on what is wrong with it?
I watched it a while ago and I'm not motivated to re-watch it, but I remember the idea that Starlink needs to launch tens of thousands of satellites upfront. They don't. They can wait until they have demonstrated customer demand, then incrementally launch just enough satellites to service that demand. This dramatically reduces the financial risk of the system.
The video doesn't make that assumption. It has relatively straightforward calculations about the size of the market, the existing competitors, the number of satellites needed to support a customer base of whatever size given SpaceX's own numbers. And the economics don't make much if any sense. The only objection I had is that low latency internet is more useful than just to gamers. E.g. voip and video calls, even ordinary browsing are unbearable with high latency connections.