The House select committee played a 10-minute video compilation including never-before-seen footage of rioters violently breaching the Capitol overlaid with law enforcement officers calling for backup, and Trump calling the crowd "loving."

In chronological order, the video followed the timeline of the day: from Trump speaking at his "Save America" rally to the joint session of Congress being gaveled in -- leading up to rioters clashing with police and storming the Capitol, prompting lawmakers to take cover.

Capitol Police Officer Harry Dunn, one of several officers in the hearing room who defended the Capitol, was seen wiping away tears before Chairman Bennie Thompson called a short recess.

Some members of Congress watching in the public seats teared up, clearly rocked with emotion by the horrific memory.

Rep. Pramila Jayapal, D-Wash., held tissues in her hands. Around the hearing room, people shook their heads yet intently watched the footage.

-ABC News' Katherine Faulders

Rep. Liz Cheney, R-Wyo., said for the first time publicly that multiple Republican members of Congress reached out to the Trump White House to ask for presidential pardons in the wake of the Jan. 6 attack, including Rep. Scott Perry, R-Pa.

"Multiple other Republican congressmen also sought presidential pardons for their roles in attempting to overturn the 2020 election," she added.

As with other House Republicans, Perry has refused to cooperate with the committee's investigation through voluntary requests and a congressional subpoena.

-ABC News' Katherine Faulders

Rep. Liz Cheney, R-Wyo., had a message for her colleagues who continue to defend Trump and his false election claims.

"Tonight I say this to my Republican colleagues who are defending the indefensible: There will come a day when Donald Trump is gone, but your dishonor will remain," Cheney said.

Cheney also had a message for the American people as they watch these hearings unfold over the next several weeks.

"Please remember what is at stake," she said. "Remember the men and women who have fought and died so that we can live under the rule of law and not the rule of men."

Rep. Liz Cheney, R-Wyo., vice chair of the select committee, shared snippets of what White House aides told the committee Trump said to them while the attack at the Capitol was ongoing, laying out what she called Trump's "sophisticated, seven-part plan to overturn the presidential election."

"You will hear testimony that 'The president didn’t really want to put anything out' calling off the riot or asking his supporters to leave. You will hear that President Trump was yelling and “really angry at advisers who told him he needed to do be doing something more.'

"And, aware of the rioters’ chants to 'hang Mike Pence,' the president responded with this sentiment: "Maybe our supporters have the right idea.' Mike Pence 'deserves' it," she said.

She then added, in new detail, "Not only did President Trump refuse to tell the mob to leave the Capitol, he placed no call to any element to the United States government to instruct at the Capitol be defended."