Because most people who don't use the Internet Explorer don't have the activeX flash player installed, which means that the video can't be played. The msi installer would basically extract and install a file called InstallAX120044.exe whose manifest contains some interessting information:-It needs to be run with administrative priviledges. Chocolatey is software management automation for Windows that wraps installers, executables, zips, and scripts into compiled packages. Chocolatey integrates w/SCCM, Puppet, Chef, etc. Chocolatey is trusted by businesses to manage software deployments. Feb 16, 2017 'Removing the custom action would allow the MSI installer to run, but it's not installing Flash Player as that's the command to install Flash Player.' To clarify that. It is possible to install the FP by removing NewCustomAction1 from MSI, but when last time I just checked if it installs, this time I checked if it actuallty works.

MSI installers for Adobe Flash Player to make the mass distribution through systems like Configuration Manager, Group Policy and WDS easier.

Adobe Flash Player

MSI installers for Adobe Flash Player to make the mass distribution through systems like Configuration Manager, Group Policy and WDS easier.
Adobe have released version 32.0.0.223 of their Flash Player client and you can now download the useful MSI installer for mass distribution within your environment.
Having the ability to use MSI installers is much easier when it comes to deployment to a large number of computers.

Install Flash Player

You can use these installers with deployment tools like Group Policy or Configuration Manager.
The versions that are included in the download package are:

• Flash Player ActiveX
• Flash Player PPAPI
• Flash Player Plugin

Version 32.0.0.403: New release