Different YOLO work on the same video with different bitrate and weight

[Egorundel]

Greetings.

It turned out that my video objects are poorly detected, which have a high bitrate and weigh a lot of MB:

In the first case, the video weighs 146.2 KB and a bitrate of 155 kbps, and in the second 248.1 MB and a bitrate of 271120 kbps. It's the same video, it just weighs differently. And detection works better for the first case (low weight and low bitrate).

What could be the problem?

P.S. I'm working with YOLOv11 on TensorRT for C++.