How does the computer know what to block? Do I need to provide a hotspot to my TV or Chromecast from my laptop, for example?

Storage is a negligible cost for companies of this caliber. Infinite growth with infinite profit is the root cause of these problems.

Okay, but I asked about speed.

If you really want full privacy then just use tor browser for it.

Can you actually have a fast enough connection for Zoom through Tor?

It’s just language, they don’t mean he sat down and coded it. He and his team hired someone to do it, just like his websites.