Win10 official version of the edge browser to play web video can not play what to do?

edge is the recommended browser for win10 system, but it is still good, but when you use it for the first time, you will find that you can't play the video on the webpage. The prompt says that the flash is installed. However, the computer is already installed. Why does this happen? What is the situation?

1, open the edge browser, click on the three small dots in the upper right corner, turn the page to the bottom of the click settings

2, continue to the bottom to the bottom “ View advanced settings”

3, you can see the "Use Adobe Flash Player" option, check the box, and then try it, is it OK?