Welcome to the wonderful world of web video. The easiest way to add video is to use a specialist video hosting site and link that to your ordinary web pages - by using an embedded player on your pages or simply by linking to the location of the video.
The specialist video host deals with all the technical problems.
Depending on the type and purpose of the video, you can use "free" services such as Youtube or MySpace for low resolution video; services such as Vimeo for high resolution video. There are also "professional" services. Certain services are more popular in certain countries.
Except for very special purposes, web videos should be short: 4 minutes is "long"; 10 minutes is "very long"!
This is one of my test pieces:
http://uk.youtube.com/watch?v=-evjUfkRDHU&fmt=18
Most web video is supplied in Flash format, using the FLV or the VP6 codec. Many video hosting services will do the conversion into Flash. Some video is in MPEG-4; some is in Windows Media (.wmv).
The MPEG-2 produced by your camcorder is too bulky for use on the web. You'll probably also have to reduce the frame size, to reduce the file size & bit rate.
So, you'll need to edit the video, reduce the frame size, and convert it into a format acceptable to the video hosting company.
Richard