Satellite footage of a rocket launching from the Gobi Desert

Here is the footage as originally posted on Chinese social media site Weibo: https://m.weibo.cn/status/Gyh7m9j4a?refer_flag=1001030103_&j...

Given that the observing satellite was traveling at around 17,000 MPH, one wonders how they managed to get such stable footage of the liftoff.