In any of the Publish Services you can configure what should happen to video that is published. I have tried this with a Hard Drive Publish Service and a SmugMug Publish Service. If you configure the video as original and unedited then the publishing works. If you switch to the H.264 conversion and put the quality at Medium (may fail with other settings as well, didn't test them all) then some of the AVI and MP4 videos in my collection may get converted, but with a list of videos the tool always hangs. Sometimes it hangs right away, sometimes after a few videos. I have been forced to do video conversion outside of Lightroom, which is frustrating.