HftU in Mac rendering to black / missing 3d object

Hey all,
I just set up a pretty cool render, but when I render it out to mp4, the render is completely black. I did a render to YouTube and there Are black gaps in the video, as well as the 3d object missing
Has this happened to any of you? It's somewhat particle/blur heavy. It looked like it happened after adding a second light and flare.