I refuse to acknowledge anything Riot's "lore team" releases
Because it is obvious that they don't give a shit anymore.
The great deletion retcon? Why should I acknowledge this when most of the champions directly involved with the League and Institute are still unchanged? Instead of accepting this half-assed (ore more like one-tenth-assed) attempt at retcon, I'll just assume that it never happened.
Shurima event? It does not exist. Since it is painfully obvious they don't plan on updating any of the champions involved anytime soon, for the sake of canon I'll pretend it never happened.
Those flashy videos that explain nothing about the character? I won't watch them anymore. For Ekko, when I see a good piece of fan made story on the boards (and it WILL happen eventually), it's canon in my eyes. I'll probably be creating a collection of best works for every champion and upload it somewhere soon to share.
It is a shame that stories made up by fans are 10x better written and longer than those written by supposedly professional team that gets paid for it.