It's good that he's unreservedly apologised for what he said. I don't for a moment believe he genuinely holds racist views, but that doesn't take away from the importance of what he said.
And frankly, the total racist shitshow in the comment section is exactly why it's such a big deal when public figures like Felix slip up like this. I reported over 50 hate-speech comments in about 15 minutes alone.
Here's about ten minutes worth of comments, there are more every time you refresh the page.
https://i.imgur.com/jxBknjC.png
This is why it matters, because it normalises vile, racist language among a very young, impressionable audience who are already over-exposed to alt-right 'culture' and language. It wrongly teaches them that it's acceptable to use one of the most highly charged racial slurs in the English lexicon.
While I appreciate his apology, I really think he needs to address the topic head-on. I think he's more than capable of doing that, I do genuinely believe he understands why it's so unacceptable for someone in his position to use that word in the way he did, but I think he needs to make it clear to those who follow and look up to him - particularly his younger subscribers - why it's not okay. He's in a position of responsibility and influence, and he really needs to use that as a positive platform.