I got here after the moderation so I have no idea what is in that video that was removed. Based on Chermog's comment, it looks as if the slur may have been a misspelled variation of it, which means you have to help the IFS learn that this racist person's intentional misspelling is still the same thing as the properly spelled word.
Based on what I've read in various threads and people posting their chat logs, the IFS appears to be good at picking out common misspellings of things like someone saying n1- - - r instead of ni- - -r.
There's been a pattern where people have done more and more to hide their toxic behavior as Riot gets better at detecting the toxicity.
It's why trolling has evolved from buying no items and running down lanes and dying to towers, to buying items and running down a lane and dying to towers, to buying items and running down lane and dying to towers and champs, to buying items and doing nothing and dying to enemy champions, to buying items and using only a few abilities and still dying to champions, to now trying to make it look like someone is "playing poorly" when they're actually intentionally feeding.
The level of stealth troll is so high. It's not a surprise people are trying to hide their toxic comments with equal efforts. If it is an uncommon misspelling just do your part in reporting them and helping the IFS learn what is an uncommon intentional misspelling of the slur. It may take the IFS time to learn but it will learn.
