What are these warnings for? ("Video Catchup Needed")

Hello all,

I’m making an experiment where participants will see two videos and then have to indicate if they match or not. Right now I have it set up so that the videos appear in the same routine. They are each four seconds, and separated by a 1 second pause. It seems to work just fine, but I’m just wondering what these warnings are that show up in Runner that say “Video catchup needed” and if it’s something I need to fix with how I’ve setup the videos:

13.1837 WARNING User requested fullscreen with size [1280 720], but screen is actually [1920, 1080]. Using actual size
22.1311 WARNING 0.1965280994772911: Video catchup needed, advancing self._nextFrameT from 0.0 to 0.03336666666666667
22.1311 WARNING 0.19656389951705933: Video catchup needed, advancing self._nextFrameT from 0.03336666666666667 to 0.06673333333333334
22.1311 WARNING 0.19658019952476025: Video catchup needed, advancing self._nextFrameT from 0.06673333333333334 to 0.10010000000000001
22.1311 WARNING 0.19659429974853992: Video catchup needed, advancing self._nextFrameT from 0.10010000000000001 to 0.13346666666666668
22.3379 WARNING 0.17690329998731613: Video catchup needed, advancing self._nextFrameT from 0.0 to 0.03336666666666667
22.3379 WARNING 0.176986800506711: Video catchup needed, advancing self._nextFrameT from 0.03336666666666667 to 0.06673333333333334
22.3380 WARNING 0.1770477006211877: Video catchup needed, advancing self._nextFrameT from 0.06673333333333334 to 0.10010000000000001
22.3380 WARNING 0.17710630036890507: Video catchup needed, advancing self._nextFrameT from 0.10010000000000001 to 0.13346666666666668

Thanks in advance!