According to a tweet that was shared to the ResetEra forums, it may happen as soon as 8 November.

— NintendHOME (@NintendHOME) November 3, 2018 Besides the tweet, there’s not much else to go on, but it’s as likely to be true as the other way round. It’s difficult to imagine making a YouTube app being something difficult for a company like Nintendo. It does have the Hulu app after all, even if it is not available for us here in Malaysia. (Source: Twitter [1], [2], ResetEra)