OK I just re-read your signal chain. It should be more like this:
(HDMI source) > HDMI cable > USB 2.0 HDMI capture device > USB OTG adapter > Hypno
You need one of these adapters to connect the USB2.0 capture device to your Hypno: https://www.amazon.com/UGREEN-Adapter-Samsung-Controller-Smartphone/dp/B00LN3LQKQ/