It's security footage from the Capitol building security system. It's narrated after the fact.Really? What does the video say exactly?
Your own words
What the video itself "says" is presented in images.
Read the article related to it. It's an opinion piece based on the fact that it's a group dressed in Antifa garb, not typical of Trump supporters, and states that this happened before the "insurrection" began.
I agree with that opinion and you do not.