Team Thor really happened in MCU. It's canon!
Unless it's specifically contradicted by other MCU properties, Team Thor is a canonical piece of the MCU. It was released by Marvel, it has Hemsworth as Thor and Ruffalo as Banner, and as silly as it was there's nothing in there that couldn't be in the Marvel Universe.
Until further notice, Thor really did move in with a guy named Darryl and bother him at work, and have a little pencil drawing of Mjorlnir holding a tiny Thor on his wall.