Lower Third Item

Sorry If I have not posted in the correct area, but need advice on an issue I am having.

I have a QT + PNG lower third pack (30fps 1080p) created in After Effects, but have noticed when rendered in AE and previewed in QT, it plays slightly choppy. It does not occur when rendered in h.264 and previewed on a TV (which I tested)

My concern is this may cause the reviewer to reject my item. Does anyone have issues like this?