A woman often gives me trembling videos and doesn't talk to me much.

There are many possibilities for this situation, and the following are some possible explanations:

1. She likes you, but she is not good at chatting, so she communicates with you through trembling audio and video.

She may want to establish a relationship with you, but she is not sure about your attitude, so she tests your reaction by shaking audio and video first.

She may just want to share her life with you, but she doesn't care much about the content of the chat.

She may just treat you as an ordinary friend and shake the video just to share interesting things with you.

No matter what her intentions are, if you have a good impression on her or want to establish a relationship with her, you can try to chat with her on your own initiative or communicate with her by replying to her vibrato. If you are not interested in her, then you can choose not to reply or reduce the frequency of communication with her.