Q: Suggested improvements for Quicktime

If you swipe just a little while watching a video in Quicktime 10.4, it moves as expected and continues. But swipe more and it will pause, requiring hitting the spacebar or clicking play to get it going again. What it makes me do is keep my left hand on the spacebar to keep unpausing the video. I'd like the video to never pause after swiping.

This habit of hitting the spacebar then comes back to bite me when I'm using Trim (Command-T), when it causes an error beep instead of playing the video. I'd like the spacebar to always be a shortcut to play/pause.

Quicktime is excellent for quickly creating short clips of videos using the Trim feature. But I have to jump through hoops to be precise. If a video is much longer than a couple minutes, dragging the handles skips frames. So, I create clips that begin earlier and end later than I want, save them, close them, reopen them, trim again, save again, and then delete the old save. It would be much more convenient to be able to define those clips with single-frame accuracy before I save them the first time. Right now, the left and right arrow buttons cause the left trim handle to jump by 30 seconds. Instead, I'd like them to move the last handle dragged by the mouse to move by a single frame, with the same functionality that the arrow keys have while a video is paused.