I can't believe this shit. Not even mastering it, just learning the trick correctly. Similar with my TA Reverse, I learned it the wrong way originally. For TA Reverse it took me like a year to finally correct the shit, but now mine is fucking perfect. I'll post a video of what I'm doing.

http://youtube.com/watch?v=bAEJ9A7grpk&mode=related&search=

Also having trouble with reverse backaround because of it's similarity.

http://youtube.com/watch?v=ersBiOLjntU&mode=related&search=

Spam club, halp me.

On IndexAround:
I think you hold the pen at too much of an angle before doing the trick, it should be almost horizontal.
It also seems you are trying to push the pen as fast as you can in order for it to get round. The IndexAround is a very relaxed trick, the pen does not need to be pushed hard.

I made a video. The first two IndexArounds are (a maybe slighly exaggerated of) what you're doing now. Holding the pen at a great angle and forcing it around. The latter two, are how the IndexAround should be done. The pen starting at a lesser angle. A controlled motion from the push, thus the pen does not travel fast, and this gives you a lot of time to position your middle finger for the catch (and then you can also catch it in the same place each time too). Since the pen aint going fast, you got lots of time to 'land' the trick, and you tend not to drop :)

You can DL the video from Rapidshare too if you like:
http://rapidshare.com/files/47172905/IA.wmv.html

Mats is right, it looks like you are pushing way too hard. Try slowing it down a bit and see if you are more successful.

spammer's bin? must be a rickroll.

I did not get Rickroll'd by the first link, however I have no tried the other one.