we tried one to send the TV signal (i.e. satellite) to a TV in the conservatory. Never really worked that well, but it all became academic when the telly in the conservatory first died & then got burgled
how close together are the TV & stereo? If your TV has phono outputs & the stereo has spare phono inputs, provided they’re not too far apart, you could cobble up some long phono leads. Might look a bit messy though
But if you have a fairly modern TV with Optical audio out & a surround sound home cinema system with Optical audio in, that might be a better bet