Whether it is possible through vlan'y to make a hub from a router?

Question

Computer networks

In principle, everything is in the question, although I may not understand the essence correctly. For example, when I added two ports to one vlan, the Internet fell off on the TV set-top box

Answer 1

In general, I figured out how to make a vlan on two ports and watch the traffic going to the neighboring port, now it remains to write a video player for mpeg ts, but that's another story

Answer 2

You can't make a hub out of a router