multi page flash using doesn't work anymore in win10

Hello,

I used flash player years ago for broadcasting webcam streams on multi pages with 3 different browsers. I broadcasted in explorer, firefox and also chrome browsers, generally 3-3-3/browsers active broadcasting pages  using flash.

Im using webcam splitter to share my camera, named visit-x webcam splitter

That worked like a dream under windows 7.

Now we using (have to use) win10

Only the Chrome allows the multi page broadcasting. Edge, explorer ad firex allows only one page for flash. When i try to open the second page I've got the click-to-play, Allow and then nothing. Right click check, all allowed, microphone pot moving. just no pic

I'm already tried all the general solutions, enabled extensions, add-ons, setted group policies, whitelisting manually but nothing helps.

Summary

With windows 10 (1706) I've lost 2 browsers to using flash

I can open just the first page using flash second pages doesnt works (only in chrome)

Kindly ask you to let me know your opinion, thank you !