What is best way to use html5 in ue?

hi,

i have checked plugins but in link GitHub - UnrealEngineHTML5/Documentation is not 4.25 version? Will still work 4.25 version the same plugins?

What is different between this plugins and pixel streaming? As I can see pixel streaming can works in browsers too and can move characters too.

In one link I can found html5 must be downloaded game before launch?