I've got lots of videos from YouTube and stored them on my computer. It's really interesting to watch these YouTube videos on my laptop. Recently I'd like to convert these funny YouTube FLV videos to MP3 files that I can play on iPod/iPhone and iTunes. I found some online YouTube to MP3 tools and some desktop software. Some of them are free, some not.
Finally I picked a YouTube to MP3 tool called YouTube to MP3 Converter for Mac. This software is a free trial application for Mac OS X that accomplishes this task quickly and easily.
It just takes one click to convert YouTube FLV video to MP3 files on Mac OS using this Mac YouTube to MP3 Converter for Mac.
Download free iFunia YouTube to MP3 converter for Mac

Step 1: Download and install Mac YouTube to MP3 Converter to convert YouTube videos to MP3
We’ll be using a very nice video converter software for Mac OS called ‘iFunia YouTube to MP3 Converter for Mac’ for converting YouTube FLV video to MP3 file, head over here and download the free trial version. Next step is to install the program.
Step 2: Run iFunia YouTube to MP3 Converter for Mac and add YouTube FLV video files
Now run iFunia YouTube to MP3 Converter on your Mac and select 'Convert FLV to Video'. Then click the big button "Add..." to add YouTube FLV video files on your hard disk, you may add as many YouTube videos as you want to convert to MP3.
Step 3: Select the video titles that you'd like to convert
Only the titles you checked will be converted. So if there're some YouTube FLV videos you don't want to convert, you need to uncheck them or 'Remove' them from the right-click menu. 'Clear' in the right-click menu means remove all titles in the list.

Step 4: Set the output format
There are almost all common audio formats available for you to choose to convert to. You may convert YouTube FLV videos to different audio formats for playing back on your mobile devide, such as iPod, iPhone, PSP, cellphone, etc.
Here I set the output format to 'MP3-MPEG Layer-3 Audio (*.mp3)' and the audio codec as default. Remember that the output file size mostly depends on the Bitrate you set. Larger Bitrate, larger file size. Actually MP3 audio with bitrate as 128 is acceptable.
Step 5: Start converting YouTube FLV video to MP3 file
Now you may click the big button "Start" to begin converting YouTube FLV videos to MP3 file. Once the convert is complete, iFunia YouTube to MP3 Converter for Mac will place a new version of your video on the desktop (depends on the output folder setting). Double-click the new MP3 file and play it to make sure it looks as you expect.
YouTube to MP3 Converter for Mac is the best Mac YouTube to MP3 converter software to convert YouTube FLV videos to MP3 file for iPod/iPhone/PSP. You may use iFunia YouTube to MP3 Converter for Mac to convert YouTube FLV videos to MP3 for playback in media players and mobile devices, like iPod/iPhone/PSP.