If you want to play your digital cam or cell phone videos on the the site you have two options.

Preferred option 1:
Convert you video to and flv or mp4 formatted video using a free video converter or quicktime pro. If you are on a mac there is a free video converted called ffmpegX There are installation instructions here

There are plenty of free windows converters also based on ffmpeg. You can download RIva ENcoder for FLV for windows

I believe they are both based off the opersource video converter command line program called ffmpeg In fact if you upload an mp4 to the site, ffmpeg converts it to flv automatically so it is best that you convert to flv format directly in order to avoid double conversion which can result in a lack of quality.

Once you have a 320x240 flv file, upload it to your journal like you would any other media and it will automatically be converted it a flash video play. I used this option for the videos in (e:paul,4738)

Option 2:
Put the video on youtube and then link it here so that the video plays in your journal. This option is better for large size videos that exceed the 7MB limit on estrip. Whiel I think most videos will stick around on youtube now that it is owned by google, I am leary about posting videos there, because as I said before at any point they could begin to charge you for your own content or remove the videos leaving you journal with the video in it, a large black hole style void.

I used this option however, for mikes murder mystery video (e:mike,587) and the windows vista video on my journal because they were both huge files.
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In order to do this sign up for youtube, follow the instructions and at the end write down the the id for your video. It is the part that ends in v=pJM39EytAYU in the url of your video file on youtube. The part after the v= is the id of your video. Simply copy that down and paste it into your journal between youtube tags like this

[youtube]pJM39EytAYU[/youtube]

The yourtube video player will be added to your journal.