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YouTube is known by almost everyone as a famous video web, as most of us watch videos there. Anyway, have you ever thought of downloading videos from YouTube and watching them on your computer? This is how you can get it done.

Part 1. Download YouTube Video Using a Free Tool
Part 2. Play Downloaded Videos or Local FLV Files Using a Free Tool

Part I: Download YouTube Video Using a Free Tool

Free download Free YouTube Downloader for Mac and install it on your Mac (Snow Leopard, Lion included).

Launch the Free YouTube Downloader for Mac. There are three ways to download online videos with it:

1. Run Safari and find the video you want to download. There will be a Download button at the top of each video you view on Safari. Click it, and then the video will be added into the Downloads list of the Free YouTube Downloader;

2. Click Downloads>Enter a URL on the Free YouTube Downloader menu, enter the URL of the video you want to download and click OK, then the video will be added into the Downloads list of the program;

3. Drag the URL of the video you are playing from the address field to the Free YouTube Downloader icon on Dock, and the video will start to be downloaded.

This free YouTube downloader can download online videos really fast. Meanwhile, it provides downloading controling functions like pausing, retrying and resuming on the Download menu.

Part II: Play Downloaded Videos or Local FLV Files Using a Free Tool

You can play downloaded videos on this Free YouTube downloader for Mac just by double clicking them in the Library list. If you want to play local ones, click Library > Add flv files to Library, add and double click them. This Free YouTube downloader has a professional built-in video player for downloaded and local videos.

Convert Video : If you want to watch the downloaded videos on your mobile devices or convert them to regular formats supported by QuickTime player. You can use AllMyTube for Mac which supports more websites, and then you can convert them or your local FLV files to the formats supported by your mobile devices such as iPod, iPhone, cell phone, MP4 player and so on.