I suggest Fraps. For anyone who wants it for free just download it from here.
[MODEDIT: Link removed. It's probably not a good idea to encourage software piracy here...]

edit: you say DaB took most of the time ones, take a look on WOGFan and click on the Players button at the bottom, who has the most

Now I have to beat you for a record .

Quick note about fraps, it's better to record to a seperate hard drive than the one you are playing the game on. Yeah PaterB, I sit there board thinking of ways to save goos/moves lol. I've been looking at upper shaft, there has to be a way to collect more goos, yet to find it though. I have noticed some strange goings on with the shaking bug when you apply it inside the cage.

I tried the shaking the bug the structure gets stuck on the wall and not giving me a goo.Though i think its possible to get 2 or 4 more goos for breaking the structure but i had no luck.

I was looking for a free recorder like hypercam (though I cant record videos in it very well) but thanks.

Hypercam will only work if you play world of goo in windows mode.

It seems you can't record World of Goo in fullscreen mode with any recorder

Fraps works in full screen, I also use to use zd recorder.

I tried using fraps but the video stops at 30 secs I think.

Edit:For screenshots how can I post it here?

Link to the image on tinypic.

Don't use the feature then.

I made a video of what happens in the cage with the shaking bug,i couldn't get any goo balls but i think at the end it was possible.I'll see if there is any thing which will let me upload it.

I wonder whether you can get 23 on small divide or 21 in fisty's bog.

I dont have much luck getting goos of fast clicked balls or I would try it.

@mr weed, those black goos in the cage would be impossible to collect, so the only extra ones would be a fuse or common, yes?
Have you ever thought about building a tower, you should be good enough to get in the top ten.

@naveed, 21 on fisty might be possible, but it would all depend on how lucky you were so you have enough balloons left to pull another off, and even if you did you might lose one to a strand snap if the balloon is on it. I wont ever be trying it again.
23 on divide, I would say it cant be done, I once tried doing the trick you see on Ode to the bridge builder(61b) but couldnt get it to work.
Strangely theres no vid for 22, one should be made really.

Yeah.I cant do it because i can only throw ivy lines and never really tried a common line.I might have a try though.

Edit:I'm trying to do burning man in 4 seconds.My best was 7 seconds but I was a bit slow on getting the goos to the pipe

After you saying that I just went and had a go at it again and got 4, sorry
http://imageshack.us/a/img571/6458/bm4s.jpg
Maybe 3 is possible.

Awesome.3 might be possible if u can move the structure and the head at the same time with a fast click on the continue button.Now I got to find another level.Maybe hello world 2 seconds is possible.
Edit:For moving the head is it random or do I have to hit the ballon in a specific place of the structure?

Anywhere will do.

Had no luck with burning man (6 seconds) or hello world (7 seconds).

Done it in 3.

Man thats cool.I have problem moving the head.I cant get it to move with the first try.Though I dont think 2 second is possible.

I didn't fully explain before, what you want to do it hold the balloon and move it at speed downwards without letting go and it'll get ripped out your "hand". You dont actually throw it at the structure.

This 'bug' can be really annoying.I found this while I was trying to do you have to explode the head in 2 moves.I saw for some reason the fuse would bounce on the structure and land in a different place with high speed (which in that level cause a fire and burned all the fuse except the balls in the structure).I really didn't care about it until I saw burning man in 5 seconds.

question,if I did chain and get 24 goos with 7 moves,dose it count as a record?

Nope all chains goos have been collected and in 0 moves. Also wog plays in 800x600 resolution so you need to adjust the zd recorders window to that in the top left.