>>Also, what video editing software do you use? I figured out how to insert videos from YouTube, but can you do the same with other sites?
>>

I use Windows Movie Maker.

It varies, based on how each forum site is set up. Some are set up like this one, where you just enter the Video's URL and some aer set up so that you have to put the YouTube video's embedding code into the body of your post.
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Mike Heinrich,
Mike@amazontreeboa.org
www.amazontreeboa.org