Need help with Vegas render settings.

This is my render setting

https://ibb.co/w0j4nqW

The question is my video is only 14 minutes long and the size is about 900MB, which is too big and when I uploading to Facebook.

Second question, when uploading the Facebook suggesting they my video not even HD.

Could you help me what I did wrong?

Thank in advance.

Try to low their render