This one is difficult to explain.
To prevent having to make text clips for every single frame, I'd like to suggest being able to make a text clip that when played, it'll work like a real-time timer. The length of the clip is when the timer should stop at, and if we set it to a real-time countdown, where it should start at, and wait for it to reach 0.
It would look like this:

We could also set it to 00:00.000, 0:00.000, or 0.000. And like the text clip, we could change the font, color, outlines, background, add the shadow, and align.
I thought this would be cool for speedrun videos, and the problem lies in having to make clips for so many frames.