Can you share the original link to the "SAC" video? I googled and baidued but found no where from SAC officially. Since this kind of media outlet is supposed to be for general public, I expect it being easy to be found. When I say official, I mean the video published on a weibo account certified as belonging to SAC, or a domain name owned by SAC.
The SAC media logo from your screen dump looks strikingly resembling to CCTV media logo.
View attachment 131836 I am surprised that CCTV is ok with it.
I have also found the similar footage from Bilibili but without the logo here,
I can tell that it is easy to add a logo type on a video footage, but almost impossible to remove it cleanly without leaving noticable artifacts.
View attachment 131837
All these put together makes me wonder if the whole thing of "SAC media" is a fake news/hoax.