Part 1 How to download YouTube video free

Video downloader

If you are using Firefox, the easiest way to download videos from YouTube I think is to use one of available free plug-in called “video downloader”. It is a free Firefox plugin, also a quick and convenient way to extract your favorite YouTube videos using this add-on. Besides YouTube, this plug-in supports other video streaming sites including Metacafe, Google Videos and Dailymotion.

YouTube Grabber
YouTube Grabber downloads files from YouTube in .FLV format. Copy and paste the URL of a video from YouTube into the program, press "grab", and the file will be downloaded into the same directory as the program.

Part 2 How to convert YouTube video to sync to iTunes

Mostly, the video downloaded from YouTube is FLV format that isn't compatible with iTunes. To put YouTube video to iTunes, you are required to convert YouTube video (.flv) to iTunes file which should be mp4.
Here we will introduce two ways for your reference.

Online video converter
Free online Video Converter like zamzar.com, vixy.net/, KeepVid.com, etc are all web-based video downloader and online Video Converter.

However, these online video converters often offer a poor service. Someone claims that half of their videos after conversion cant be played in iTunes. Others claim that the video comes out poor quality.

Anyway, you may give it a go to see how it works by your own!

An alternative - YouTube iTunes Converter http://www.hd-dvd-ripper.net/ipod-movie-converter.html#139

Since most of the online converters cant satisfy us, then some developers has developed a desktop application which can convert YouTube Video to iTunes. These tools have a rich codec embedded and usually offer a simple editing function. Here iSkysoft iPod Movie Converter which is a good YouTube iTunes Converter that will convert video from YouTube to iTunes directly.

In this guide we will explain how to convert MKV to AVI WMV MPEG MP4 VOB DVD with iSkysoft MKV Converter(http://www.hd-dvd-ripper.net/video-converter.html#139). It includes 2 parts.
Part1: some knowledge about MKV video format
Part2: how to convert MKV to AVI WMV MPEG MP4 VOB DVD and add subtitle to MKV

Part1 some knowledge about MKV video

What’s MKV video format?
An MKV file is a Matroska file, the Matroska Multimedia Container is an open standard free Container format . It is similar in conception to other containers like AVI, MP4 or ASF, but is entirely open in specification, with implementations consisting mostly of open source software. Matroska file types are .MKV for video (with subtitles and audio), .MKA for audio-only files and .MKS for subtitles only.

How to play MKV files on Windows?
In principal you can play MKV files on almost every Mediaplayer on Windows if you have the latest CCCP playback pack from Matroska Download Page installed, as most of these players are based on Microsoft DirectShow (TM).

Part2 how to convert MKV to AVI WMV MPEG MP4 VOB DVD and add subtitle to MKV?

Things you will need
MKV video
MKV Converter
Seperated subtitle in srt format

Get Start:
1. Download a iSkysoft MKV Converter(http://www.hd-dvd-ripper.net/video-converter.html#139), install and run it

2. Put your MKV subtitle in the same folder with MKV video and name as the MKV.
ie. D:\Movie\chd-ntbos-bdrip.MKV D:\Movie\chd-ntbos-bdrip.srt

3. Then select “Add” button to load the MKV video files, this MKV Converter will detect your subtitle and add it automatically.

4. Click the "Convert to" drop-down button to choose the output formats;
Click the "Target Path" button to find the destination folder for output file;