HHelp with adding missing frames at regular interval

[Dave37207423lk3q]

I wonder if anyone might be able to give me some guidance, please.

I have a video that was originally shot at 30fps but at some point was converted to 25fps, and so every 6th frame is missing, causing a jittery viewing experience.

I've installed the Frame Restorer script but am having serious difficulty in understanding how to insert new frames at these regular intervals. I believe one should add repeat markers - but should each marker be placed on the frame which is AFTER or BEFORE the missing frame?

I've tried both, then tried INSERT skipped frames, but the resulting rendered file is till jumpy.

Any help would be greatly appreciated!

NOTE: the missing frames do not appear to be automatically detected, hence I am needing to manually mark these out and insert a new frame after every fifth frame.

[Dave37207423lk3q]

I should add, I'm talkimng about the After Effects app.