The mp4 issue is mostly resolved. SD is the wrong aspect ratio, but HD should look correct and full screen is no longer needed. This is for NEW mp4 uploads only. I will soon have a solution to replace existing mp4 videos, once I solve the SD aspect issue.
Private video thumbnails no longer show up in public view.
A description area like before, on uploaded videos, so you have a place for text and info about your upload.
Better tags to allow for phrases
Various technical improvements
Premium option to allow for larger, high quality uploads and more user space