1st of all need to think about the contingent of people we aiming for.
Big tutorial video is great for newcomers, but not for our contingent. We need something different
Imagine you are the guy who wants to play smth, and dont know what to choose. If you will make a vid or write post on some forum remember to show/tell how simple setting all up on worms, tell about open multiplayer, drop link of web snooper. Its much easier to open link than download something, so when they see the server going online and you can join any game just download the game 1st they will do nothing but try to get W:A, the question is how long will they search for it? Important here to link them just directly to worms download link. W:A Battle Pack come up very useful here, with latest update and repacked to 40 mb but with ability to play online, everyone can download it, even ppl with terrible connection
2nd step must be introducing to the awesomeness of the game, saying there is new updates time-by-time means saying nothing, much senseful will be posting mods made for W:A, Portal Gun for W:A is great example
And finishing should be about perspective of playing, tell about simple league, about making your own clan with friends and challenging top players, about amount of league schemes and becoming the top on the standing. Last thing you should post is again link to the game, big letters approves!