Youtube has giant collection of videos library. You can spend hours on YouTube while surfing thru your favorite movies. The only problem with YouTube is unavailability of movies in various format like AVI, MOV, MP4, 3GP, MP3, etc for downloading.
In case you need to convert YouTube movie to AVI, MOV, etc formats, then first you should download YouTube movie using any YouTube video converting tool to convert to the desired format.
Does this sounds tedious and time consuming task,
actually with iSkysoft iTube Studio for Mac, it is easy to do it.
iSkysoft iTube Studio for Mac can finish the process of downloading and converting in one step. It allows you to download YouTube movie, Google videos, Yahoo video and other websites' videos, and directly convert to some popular video and audio formats, including AVI, MOV, MP4, MP3, M4V, WAVand so on. Alternatively, you can convert to portable players at first hand.
Download movie from YouTube, Google and more
This program allows you to download movie from YouTube, Google, Yahoo, Break, Metacafe, MySpace, Gofish and other video-sharing sites.
Convert YouTube movie to popular video and audio formats
With it, you can convert YouTube FLV videos to popular videos formats and extract audio from YouTube video to MP3, WMA, M4A, AAC on Mac OS
A functional FLV player bulit in
It has a functional FLV player which lets you play the online and local videos on your Mac with great quality.
Support sorts of popular portable players
It allows you to transfer the converted video to iPhone, iPod, Apple TV, Zune, PSP, Xbox 360, etc portable players.
Run iSkysoft iTube Studio for Mac and login your password
After you have purchase this software and install it, double click to run it.
When you first run it, you will get a pop-up window asking you to input the password of your Mac login account. This step is very important for the program's Sniffer function. Please follow the steps as stated in the pop-up window below: Note: After re-launching the program, you can turn on the Sniffer function.
Download YouTube movie from kinds of websites (Free)
This YouTube movie to AVI downloader for Mac allows you to download movie and video from kinds od websites for free.
Open the web page of the video you want to download, and when it starts to play, the program can automatically detect it and begin to download it. You can open multiple web pages to download several videos at a time. Convert YouTube movie to AVI on Mac
Select the files you want to convert from the Source List, and click the Convert button to convert the selected files.
In the Convert window, you can choose "AVI - Audio-Video Interleaved(Xvid) (*avi) as the output format or you can choose the format for some portable player directly, then you should specify the output directory, and click OK to start conversion.
In case you need to convert YouTube movie to AVI, MOV, etc formats, then first you should download YouTube movie using any YouTube video converting tool to convert to the desired format. 
