During playback, Premiere Pro drops some frames because the footage is not smooth and because of how the playhead moves along the timeline. If the playhead shows small jumps instead of running smoothly along the timeline, that can be a sign that some frames have been dropped. So, How to fix the lagging video? -> Change resolution The first thing to do is to change the playback resolution for your video without altering its export resolution. Doing this can reduce playback lag significantly. And for creating such a change, click the playback resolution dropdown menu (the ‘full’ button) and select any of the 4 options from there to reduce the playback resolution to a fraction of the native resolution. You may see: 1/2, 1/4, 1/6 or 1/8. -> High Quality Preview We always prefer to see our video in high quality as it looks so good as well as the same quality that we are going to upload on YouTube or export. But choosing high quality preview can reduce the...