Hairy Scot said:
One of the "Samsung smart" TVs in the house has just a single USB port but multiple HDMI ports.
That single USB does not support a USB hub, so connecting more than one USB device is not possible.

However the problem may soon be solved by splashing out some bucks on a newer model.
Huh? The hdmi ports will only be hdmi in.

The usb port may be usb in or usb out (but out inay only be for power).

It is still not clear what you are trying to do.