Oh man. Talking to a screen, being pressured by time, trying to look and sound good, seeing your image that distracts a lot... I hated video interviews.
Anyway, it’s hard to judge without looking at the the video(s).
Try recording yourself answering those general interview questions and see what do you think. Show it to your parents or friends and get some feedback. Maybe there’s something you can’t notice yourself.
Generally, no one is good at anything unless they practice. So another suggestion is to become comfortable when being recorded - practice answering the questions at least a few times while also recording yourself.