I just worked on a security camera video, I got it the size I needed by using effect>Zoom. that is fine, After exporting the video opening the new version I wanted to sync the audio and video, easy enough, usually. This time the video didn't show in the preview window, or on the timeline after dragging it there, so i couldn't do what I needed. I ended up unlinking the audio track and exported it as is. It plays fine in VLC and online, just not happy about not being to edit the video further.