Not cheap to fix this scenario. I use a Vertex Fury. Input 4K60 > Output 1 = 4k60, Output 2 1080/60. My capture is an ezcap 269. This device will not affect EDID so you can capture in 800x600 for super fast video capture.
Easycap 269 seems a bit overkill just to capture no? I'm assuming it wasn't good enough for the hdr bypass and capture so you had to get the vertex fury to strip out the hdr on the 1080p output and just use the Easycap for capture on that?