Like PaulHoule, I have an old house, but with a new electrical system. It was proudly rewired by yours truly, with GFIs and AFCIs all over -- and an added subpanel.
Anyways, I use a set of powerline adapters with a second wifi router at the other end because the walls in my house are very thick (the studs are covered in shiplap on both sides). The throughput is fast enough to stream video on the other end, but I haven't put it to any measured test.
In the summer, I often take the whole setup to one of the outdoor plugins, so that we have solid wifi on the deck. So it can work quite well. Whether it will in any given circumstance is uncertain I suppose.
Anyways, I use a set of powerline adapters with a second wifi router at the other end because the walls in my house are very thick (the studs are covered in shiplap on both sides). The throughput is fast enough to stream video on the other end, but I haven't put it to any measured test.
In the summer, I often take the whole setup to one of the outdoor plugins, so that we have solid wifi on the deck. So it can work quite well. Whether it will in any given circumstance is uncertain I suppose.