My export preview and video doesn't match the timeline in Adobe Premier Pro I've edited several videos over the last month or so on Adobe Premier Pro and exported them at 1280 x 720 with zero issues.  Now all of a sudden my aspect ratio looks all buggered up when I go to export my video.  Everything will look fine on the timeline but there's a ton of extra space around the video when I preview and export.  Not sure what the heck I did.
Check your Sequence settings, you may set higher resolution that the most of the content is. Also your videos may to not fit well: right click - Set to Frame size.