"No, you cannot post them on Wetpaint directly from your computer. However, if you want your video posted on Wetpaint, you can upload it on Youtube or another video site. Once it is on Youtube, you can copy the embedded code and paste that into a Youtube Widget. This is one way of getting videos you made yourself to Wetpaint.

But to answer your first question, you cannot upload videos you made from your computer directly to Wetpaint."