Odd artifact in featured homepage video

I have a clip playing as the featured homepage video, and before it loops every time there is a still frame that appears from outside the clip. In other words, I cut a clip from a longer video for the this homepage clip, and it shows a still frame from somewhere else in the video at the beginning of each loop. I'm using the free theme as I set up my site (it's not live yet) and want to make sure I can use it as I need to before I upgrade to the Premium version. I hope this issue is fixable. My website is astralvideoart.com.