Sonic.exe in a pixar-style animated movie

Can somebody explain what Sonic.exe is? My 4 year old is obsessed with this (and regular Sonic), internet says it's a game, but it's also a series? : r/SonicTheHedgehog

Sonic E.X.E. (Short 2017) - IMDb

Sonic Exe - song and lyrics by The Virtual Realm

The Story of Sonic.EXE: Part 3-The Finale - The End? - Wattpad

Sonic Exe Sonic, Satanic art, Mario characters

SONIC.EXE Fan Casting on myCast

Sonic.exe Aakariu - Illustrations ART street

Custom Plush Just Like Sonic Exe Cyklop Sonic Plush Inspired

Sonic exe (let's play hide and seek) on Vimeo

Sonic.Exe Might Be Canon…