It depends on the video chat service you want to install.

There is no reset button since it is an unmanaged switch, so it’s just plug and play. I’m sure it gets proper amount of power. The support now just told me that the best would be to just get a replacement.

Tried with with different cables again and tried to connect a notebook and a raspberry pi. I’ve also tried every single port, but nothing shows up on the devices and no LEDs flash/blink. :(

Never had sound issues. Do you use a headset or monitor for the sound output?