Microsoft, like other browser vendors, is defaulting to HTML5 content where possible, and making Flash content Click-to-play by default. The major impact to users is that Flash content does not display, even if Flash is enabled in the browser. The behavior observed in Edge depends on which Windows 10 OS version is installed.
What version of Windows 10 do you have?
To find the Windows 10 OS Version installed go to Settings > System > About. If the Version is 1607 or something other than 1703, go to the OS Version 1607 - Enable Flash Player section below. If the version is 1703, go to the OS Version 1607 - Enable Flash Player section below. Please note the Windows “Edition” for advanced options.
Refer to the tech note https:/helpx.adobe.com/flash-player/kb/flash-player-issues-windows-10-edge.html
OS Version 1703, also known as Creators Update. This release implements Flash click-to-play, by default, on a per-site basis. Microsoft does NOT provide the ability to enable Flash Player on all sites (system-wide). More information on this new behavior is available at https://blogs.windows.com/msedgedev/2016/12/14/edge-flash-click-run. Do the following to enable Flash, per-site:
For customers running advanced editions of Windows 10, the Group Policy Editor provides a mechanism to disable the Click-to-run setting. This will allow Edge to run all Flash content to run without prompting.
I have Version 1909 and am having trouble seeing videos which I presume is linked to Microsoft Edge and Adobe Flash problems. Maybe I don't fully understand the link to the above so if needed apologies in advance. Any advice re: Version 1909 please?