“Up to”. Read the fine print, you are likely getting what you paid for.

Unmanaged switch and access point. Simple and straightforward.

Sure you put the wires in the slots. If you need more details than that so do we.

I would set up an Nginx container to forward all request to youtube.com to your ViewTube container. Then in PiHole set the A record for youtube.com to be your Nginx container.