I believe someone made this app for Android mimicking windows Live Messenger. It had this name previously but I guess he changed it because of Google play policy.
I don’t know what server is holding this app. I don’t trust a random Dev around the internet, even more coming from Brazil.
My point is, why not do a similar app to work with escargot server?
Did you realise that the video you link is in spanish and Brazil language is portuguese?
Edit: Mercury seems pretty reasonable as making the mobile msn experience happen again.
I had the official microsoft Windows Live Messenger app for iOS and i should say that mercury is pretty good.
I have seen your efforts to improve Mercury GUI. and bonus 2 people doesnt like its original skin. And bonus again, CLM has most msn features bundled such as wink and nudge.
I guess the dev could have created his app from ground and have used a custom escargot server. But he could have used other protocol as well.