Splatoon 2 is the well-acclaimed sequel to Splatoon for the Wii U. You swim/run around as an Inkling with a weapon of your personal preference.
About The YouTube Series
Splatoon 2 for Demolition Studios will probably not be a long-lasting series, just because it is outclassed by other series' (MineKart Games 3: Bedrock Edition, Pixel Gun 3D, War Robots, etc.).