I convert my movies to MP4 format then move to Itunes and then to Ipad2. There may be some other apps that will play avi but I so far have not used them.
Agree with helix, you have to get it in mp4 format. Depending on the format of your file and the codecs used, it may not be easy. Google for mp4 encoders.
There are plenty of threads and even a guide (that I wrote) on how to transcode your movies to the right format for your iPad. A search should bring them up.
Thank you soo much my friends....i did not find the flex player but i was able to convert my movies to mp4 format by downloading gom encoder,and i was finally able to sync my movies to my ipad, even my gom encoder i install was only a trial good for 30 days,hehehe, so i must covert all my movies before the end of its trial period, thanks a lot to your helps my friends.....
The really ridiculous thing is that you have to go to all that trouble in the first place. If there's one big gripe I have with the iPad, it's Apple forcing use of mp4. Period. You should be able to put those .avi videos on the iPad and play away. My pet peeve gripe with the iPad.
I use AVPlayer HD. Priced at $4.99, its one of the apps I use most and definitely worth the price. It plays a wide variety of file formats and I play HD mkv videos on it with no problem,. Try it out.