Flash Uploader replace

[Squillynet]

Hello, i have a Problem whit the fancy Upload which is integrated in Social Engine4.
Many of my Users get the Error: Hochladen fehlgeschlagen: Error caused a send or load operation to fail (Error #2038)

the next thing is, the Flash Player will not be supportet in the future by the mayor Browsers.
Firefox 55 (the next Firefox) uses the new WebApi so i want to remove flash completely from my Site.

Is it posible to change the Flashuploader whit a html5 Upload?
And if yes, How?