How to Download Youtube videos

Method 1:
For Firefox Users – Install the VideoDownloader Extension from
Mozilla Add-ons website – It downloads all embedded objects on a webpage
including the video clips. This is very easy for beginners.

Method 2: One of the easiest ways is to copy
your video URL and paste it on KeepVid Lite.
When you click submit,
you will be provided with a link to save the video as an FLV file.
Using these tricks you can easily download videos from Youtube or Google
Videos or Metacafe.

Now some more questions that arise are:

How do I play FLV files on my computer? -
They dont open with windows media player or winamp or itunes or real player ?

You can download free FLV players to watch FLV files locally.
A good FLV player has a simple and easy-to-remember name - FLV Player.
Another nice alternative is the Riva FLV player.
Try them out.

How do I split a large FLV file into smaller playable video clips?
This is the most common question among video enthusiasts -
they want to split a large FLV video file into smaller chunks for editing or
resharing only the interesting tidbits on the internet.
To break an FLV file, get the free FLV Parser – a tiny command-line tool
to split FLVs into pieces. Its intended use is to convert a large FLV into a
series of shorter FLVs based on a series of millisecond-based timecodes.
Using the -s switch will split the audio and video of the outputted files;
the audio track will be extracted as a series of MP3 files, and the short
FLVs produced will have no audio track at all.