panasonic lumix dmc fz-300/330 mp4 stream adaptor

Hi. I have a Panasonic Lumix DMC FZ-300 (330 in some markets). This camera has a HDMI output but no streaming. There are some adapters able to convert HDMI out to USB3 mp4 stream (as much as I understand) like Elgato, Mypin, Razer Ripsaw HD, AverMedia etc. There are also some very cheap...