I'll of course watch through certain sections over and over during editing while I'm getting everything right etc and making sure it all makes sense (since I often have to do retakes of segments and sometimes when I do a retake I say something slightly different - so I have to make sure it fits etc). After it's edited I'll sometimes give it a quick watch through.
Other than that though it's rare that I watch my own videos. My content is more informational than entertainment oriented, and so since I already have all the information that I'm teaching I don't really get the same value out of my own content that my viewers do.
That said I do have a couple of hypnosis tracks on my channel that I do listen to myself - but I have offline .mp3 copies of those that I listen to, rather than the videos on YouTube themselves.