Generally yes, but not always. Because of the great variety of formats used throughout the years, some videos may not open. It is often possible to solve the problem by saving in another format using a video editing software. For Web Creator 3, Web Creator 2, and Presenter 5, it is possible to manually select the video technology (QuickTime or Windows Media Player).
* Note that Web Creator 5 has a Flash Video converter that allows you to upload videos in the most compatible file format for videos on Internet