How to create a stealth kill / take down

Hello! (if anyone could send me a tutorial about this that would be awesome)
I want to crate a take down/stealth kill system, like if there are 2 players and one of the players presses F on the other player, then the first player would grab and stab the second player then push them down, thing is I really have no idea how to do that, I can deal with making the animations but really no idea how to add them and how to make the players interact in such way. Here is an example of what i would like to make: - YouTube

Could anybody give me a tutorial on how to make something like this?

Thanks in advice :slight_smile: