Inserting company logo into entire video

Our company wants to record promotional videos of our equipment running product, i have seen video from other companies that have their logo pasted into a corner of the video while it is playing. Does this require special software (If so which ones are available) or what is the terminology and how is accomplished?

You can achieve that in VirtualDubMod.
Open your video file and go to Video/Filters… -> Add… -> logo

http://forum.videohelp.com/topic248307.html