Such lags can come from a lot of sources, most likely chunk loading, and is almost certainly caused by vanilla code which we have no influence on.
This kind of lag does not appear in a video created using the Render Feature, but as of now, it does not support Shaders.
We are not going to attempt fixing the lags you experience while playing the camera path, because they are not our fault. So what you can do: Wait for Shader Support, render videos without Shaders Mod, or
âŒâ– -â–
Deal with it.