What device to connect to a Wi-Fi receiver and a player who does not have a Wi-Fi receiver
Answer
In your case, a regular repeater might work. It can receive internet from the main Wi-Fi network and transmit it to your devices over a network cable. But there are 2 nuances: you have two devices receiver and player. And the repeater usually has only one LAN port. True, there may be models with two ports. You need to look for it. And the second thing: the repeater will also amplify the Wi-Fi network. I don’t know if you need it.
Another option is to buy some inexpensive router, which can work in the receiver mode. The router will receive internet from the main Zyxel Keenetic viva router via wi-fi, and transmit it only via cable to your receiver and player.
Here are instructions on how to set up receiver mode on some routers:
There is such a mode on Netis router and others.
You can take another inexpensive Zyxel Keenetic. For example, Start.