That is Pelosi she controls the house because she is the majority leader.
Correct - at least to some extent (since you didn't elaborate further)
She is the Big Kahuna in the House - the presiding officer - and is pretty much the
de facto leader of the majority party, even though another elected official hold that particular title (Steny Hoyer, Majority Leader)
She also is the head of security for the Capitol building, then the man at arms ,then the capital police chief
Incorrect:
Fact check: Nancy Pelosi wasn't ‘in charge’ of Capitol Police on Jan. 6
The Capitol Police Chief reports to the Capitol Police Board.
The Capitol Police Board is composed of:
1. United States Senate Sergeant at Arms, who is the chairperson of the Board.
2. U.S. House of Representatives Sergeant at Arms, who is a member of the Board.
3. Architect of the Capitol, who is also a member of the Board.
4. The Capitol Police Chief himself (but who is a non-voting member)
The current Architect of the Capitol, Brett Blanton, was nominated to his position by Donald Trump, and was confirmed by the Senate on December 19, 2019.
The United States Senate Sergeant at Arms at the time was Michael C. Stenger who was nominated by Mitch McConnell and agreed to by unanimous consent.
Stenger later resigned after the insurrection and riot, as did the then U.S. House of Representatives Sergeant at Arms, Paul D. Irving.
And rightly so.