There is enough. Right here. All in one place. With good moderation and clean, easy to understand rules

This isn't even addressing the point I made there lol. What part of a random highlight subreddit having less content is a bad thing? The only thing I can think of is that you just want to watch more things, but all of the things would be uploaded in the new subreddit so it's very easily solved.

Also rule 2 is still "posts must actually be fails (discludes wins). How on earth is that "easy to understand".

So now that there are several different subreddits requiring basic setup and management with their own rulesets (Because remember, we've segregated content, but users will most definitely post the wrong content like wins to fails, etc) but you have the same amount of moderators.... Hmmm, more work, same amount of manpower.

Well right off the bat we know you're full of shit with "several", even the ones you brought up to mock that guy (who was being silly, we can agree on that I'm sure) weren't legitimate suggestions from him.

Only one more would be needed, and all of the work done to segregate the content would have been done there instead. Same (arguably slightly less) work for setup, but MUCH less explaining why each new type of post has been allowed on a specifically named subreddit. Like I said, damn near impossible to actually quantify.

Hmmm, I'm confused, let me see, this post has a "Win" flair, and the second rule on the side-bar says win-posts are allowed. Oh, it all makes sense now! Through the power of literacy I have come to understand this horribly complex quandry! A subreddit can expand past its original intent and be more inclusive, I have learned new information!

Alright if you're going to be an asshole about it let's do it like this. The fact that you even need to go into the rules to understand a subreddit called "livestreamfails" isn't purely about fails means it's "messier from user experience standpoint" than one where you read the title and have everything you need to know. That's not even taking into account that you skipped over the welcome message that hasn't been changed and has no mention of wins or any other category.

Now I don't know if you intentionally ignored that section or you just missed it, but neither support your point that a split would be "messier from user experience standpoint". It's just an objectively untrue statement, and being that patronizing in your explanation just made you look like a douchebag. I get that this is a totally pointless hypothetical discussion, trying to make me feel stupid for no reason is even more of a waste of our time.

Which can be cleared up instantly if the person decides to read past the subreddit title.

That's cool but we're comparing it to a situation that doesn't need ANY clearing up, and we already know you're not being genuine about how clear the subreddit information is anyway.