Thanks for trying this out Niels – yes I do get the same issue on scrubbing the video as on exporting. Could it be my computer do you think? The only MP4 that works well is the first very short one (Woman). The other one (Sponges) is a tiny bit glitchy on export, and the longer one (Falling) is very glitchy – both on export and scrubbing. I’m on quite a new desktop Mac.