Hi.
It looks like the LOD manager is only given a reduced point budget to render within. It may not be disabling the main camera when you do a recording.
The larger size of the points is to offset the smaller amount of points available - to better fill the gaps.
As a test, could you try to position/orient the camera in the main viewport somewhere, where there is no point cloud visible, then start the video render again?
Thanks for the report