This is wrong. There is no direct evidence to back up any of these claims. Firstly, the main glaring problem is, the Capitol Police Chief did testify to Congress on multiple occasions about the January 6th riots, where he openly expresses fault towards the government and openly said to a Congress panel that January 6th was "preventable." Secondly, court proceedings of this magnitude are never aired on prime time, or ever aired at all. Occasionally, footage may be revealed to the public, but never put directly up on "Prime Time" television. And thirdly, the deletion or misuse of evidence regarding the riots is still up in the air, but no evidence is used to support your claim it was destroyed, or that it was not destroyed. There is no evidence to support any of it.
U.S.C.P. Testimony: https://idahocapitalsun.com/2023/09/20/former-u-s-capitol-police-chief-blames-intelligence-failures-not-trump-for-jan-6-attack/
Proof that National Court Proceedings Aren't Filmed: https://judicature.duke.edu/articles/cameras-belong-in-the-supreme-court/