This tutorial is to show you a step-by-step demonstration of extracting videos downloaded from YouTube and Google Video, etc. Convert the FLV to M4A audio on Mac os.

First of all, we have to make it clear that the YouTube videos and Google videos communicating online are of the Flash Video file, or FLV file format.
What is FLV?
FLV (Flash Video) is a proprietary file format used to deliver video over the Internet using Adobe Flash Player 6, 7, 8, or 9. The ubiquity of Adobe Flash Player has made it possible for the FLV you post on the Internet to reach wider audience.

What is M4A?
M4A format are actually the audio layer of (non-video) MPEG 4 movies. M4A is slated to become the new standard for audio file compression. This format is also known as Apple Lossless, Apple Lossless Encoder, or ALE. It is a new codec designed to provide lossless encoding in less storage space.
How to get an FLV video?
There is a free tool named FLV downloader for mac, It downloads video from YouTube, Google Video, MySpace, Metacafe, Dailymotion, iFilm, Music, eVideoShare, StreetFire, etc. off to your computer’s hard drive in FLV format for Mac user. You can use FLV player for mac to view it.
Step 1, Download and install FLV to Video Converter for Mac

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