Victory: This will work when you win in a game of skywars or bedwars. This will be by Outplayed looking at the middle of your screen with the game screen VICTORY because that's the winning screen for a victory. This will only not work if there is a changed Victory screen because of Hypixel Cosmetics.
Kill: This will work when you kill someone and the scoreboard changes. If you didn't know, Minecraft has it's own scoreboard on the right screen and Hypixel uses it to update kills and update scores. Outplayed can use this scoreboard to record the last few seconds after each time the scoreboard changes when Kill: X changes, which X is the amount of kills you have. This should almost always work, besides the times where there is no kill counter on the scoreboard, which is only soloes and double bedwars.