Low quality videos on youtube why? How to improve?

Problem: I can record screen, but videos shows pretty “blurry” or low quality on youtube. Specially if I select a square part of the window to record. Is there are something I can set up?
check this one for instance:

ActivePresenter Version: Required.

OS: Required. Windows 10 64 bits


I think you should record with higher resolutions. YouTube recommend to use HD (1280x720), Full HD (1920x1080)… Your video has the highest resolution is just 480p (around 720×480).