I have a question about the "vlc plugin"

Hello, I am a user working on a personal project.

I use the VLC plugin that I shared with GitHub. => [GitHub - ue4plugins/VlcMedia: Media Framework plug-in using the Video LAN Codec (libvlc).][1]

I wonder if the options can’t be modified.

For example, an option like “:demux = h264”.
I know it is written like the picture below.
please answer me!

Thank!-!