Hand over my devices? Not likely. Just like a robber who can physically take a safe home to crack at his leisure, handing over your data, encrypted or not, is not a smart thing to do.
To get seamless streaming you need a commercial router, not an ISP supplied one. You may need to enable the 5GHz radio to see any options for it. The best solution is to give a separate ssid to each band and use the one you're closest to. I hope you'...