i actually didn't see any radar hacks on youtube.
they have good ones for walls and aims, and also barrel hacks.
most of these vids are advertisements for special hack-packs. but they're a good place to start to see what to look for.
on that note, i still think it'd be awesome if we were to get together, make a custom passworded server (non steambans, non KAC, non VAC) and have one person load some hacks and record from their perspective and from others perspectives. then post the vids on youtube and the forums as a sort of "this is what hacks can look like" thing. then also a vid or two of people who are REALLY fucking good to demonstrate difference between hacks and skill