You do know of course that Chansley was part of the mob rushing and breaking through multiple lines of police barricades. Chansley was only able to enter the Capitol after rioters smashed a window feet away from him and then kicked the doors down from the inside.
He cannot rationally claim ignorance as to whether his actions were okay or not.
This all comes before the video you reference, which, I might add has no audio. To claim merely being followed by an officer without knowing what was being said cannot imply anything. Video of Chansley in the Capitol with audio indicates the officers were repeatedly telling him he needed to leave and he chose not to.
You have a mere implication, which you infer based on a deep seated bias. Even if we accept your belief, it’s tenuous. An objective judge would not be so bias as to believe this video implies what you think it implies.