I really don't know what the phrase I mentioned in the title means, My first guess it's that if the game runs off a real Master System, the participants of this jam need to use an HTML5 emulator to emulate the SMS, and for games made with virtual consoles (For example the TIC-80 or PICO-8) they should be exported to HTML.
My second guess is that the HTML file should be a manual or something of the game.
Which theory is correct? If none of my theories are correct, please tell me what HTML file should be uploaded with the game.