I purchased a Recast durring the Black Friday sale. I have 2 outdoor antennas pointed in different directions, so used a combiner to get the 2 signals down to one for input into the Recast. Set it up last Sunday using an Ethernet cable and the phone app -all went well. Tested it with the Fire TV (pendant style) via wifi on my basement Vizio tv - perfect. (For clarity's sake, Recast is hard-wired to my Netgear Nighthawk router, Fire TV connects to router via wi-fi) Then tested it via wifi on the Fire TV 4K on my main Vizio tv upstairs in the living room - major problems. The FTV4K recognizes the Recast and will play the live streams and recordings, but so much buffering is going it's unwatchable. The circle comes on - the stream plays for a few seconds - the circle comes back - plays again for a few seconds, etc. I have no problem with Netflix, Prime Video, or Youtube on the FT4K, all of which have higher resolution (more data) than the Recast and the distance from my NetGear Nighthawk router to the FTV4K is shorter than to the basement FTV. Occasionally, the FTV4K will lose the connection with the Recast, then connect again -don't know why. As I said, Netflix,etc is coming off the same router to the FTV4K, no problem. Recast from the router to the basement FTV, no problem. Recast from the router to the living room FTV4K - big problem.
I have ordered a Amazon ethernet adapter for the FTV4K in the hope that will fix the problem, but the Recast works so well with the basement FTV that I'm beginning to think the FTV4K is defective, although I only have problems with it and the Recast. All suggestions appreciated - thanks in advance for your help.