Why is a part of my recording marked red?

Next to the video, Every part — and why lists each part with its reasons:

• Shaky camera — measured jitter above the allowed limit (for example "1.6 vs 1.3 allowed").
• Camera swings fast — the picture moves faster than a calm shot.
• Calm overall, but with a hard jolt — one sudden bump.
• Very short — under about 1.2 seconds, too short to be a shot.
• Blurry, dark or hard to read and Not much happening — the AI's view, marked AI because it can be wrong.

If nothing was measured as a problem, the part says red only by choice.