from this sort of curious article at reuters:

Fact check: Donald Trump concession video not a ‘confirmed deepfake’

Sources familiar with the matter told Reuters that National security adviser Robert O’Brien, senior advisers Ivanka Trump and Jared Kushner, along with speechwriter Stephen Miller, counsel Pat Cipollone, chief of staff Mark Meadows and press secretary Kayleigh McEnany had all pressed Trump to clearly state that he did not support the violence (here).

I don't think it's anything more than a decision that he thought would call off the heat. He got talked into it more than ordered to do it.

I agree with others here. I think he was put under tremendous pressure to do this from those around him, but he is not acting like a hostage.

His tone of voice is not stressed. He still has a "swagger" in his speech, with that stupid curled lip. There's really nothing appearing abnormal about him. If there was someone off-camera with a gun pointed at a person, that always induces some sort of stress. Really, Trump looks like he doesn't have a care in the world here. (At least to me.)

Those above are correct. He was presented with forceful evidence that if he incites more violence, he might end up in prison, and he was convinced of that. But, being in charge (in his mind), by making this speech, he is still in charge and has averted bad outcomes.

Edit to add: I don't believe you made me watch a Trump speech!

why a bully turns around and doesn't want to fight anymore? May be a bull can be afraid too? May be he thinks of his children? May be he loves his wife? May be they didn't like what he said and made him 'mellow down'?

I hope this act of the play 'Bullies United' comes to an end soon.

Trump executed every single option he had. There's nothing left.

Trump is stepping down from his challenge and laying down his preferred narrative about what has taken place in order to tweak his legacy. He is not legally liable for anything that has taken place. Even the DNC knows this. If the DNC stages a revenge impeachment, it won't be about the current outrage and the braying of "patriots."

We see politicians covering their asses every day in DC. — setting the record straight. They do this at all times of day or night, standing in front of the lone operator of a C-SPAN camera, which is set up in some empty chamber.

There is a coup taking place at this very moment. People are not seeing it because they are looking in the wrong direction. It is the nation's legislators in the House and Senate who are being terrorized by the nation's capitalist overlords. Members of the elected government are now on notice. They have received the loud message that if they collude with their local constituents to mount a populist movement, or if they promote Leftist policies that threaten the long-standing economic status quo in the country — their re-election campaign will be de-funded, and their web presence will be de-platformed by the social media Giants. Their connections with the thousands who follow them will be permanently severed. They are all suddenly singing a different tune, I notice.

Meanwhile, Our Capitalist Overlords insist that employers have the divine right to provide employee health insurance; and the major corporations are eager to fund political parties and election campaigns in support of our precious democracy. These financial dependencies affords them direct influence over people's employment patterns, and they provides an open channel of influence over the political agenda in Congress. Our Overlords have always profited significantly from military power and endless foreign wars. There's a reason why this nation has been at war during 93 percent of its existence — 222 of its 239 years. There has never seen a period of peace lasting longer than a year or two. Any politician who tries to get in the way this system is going to suffer.

As usual, Trump is a distraction and an obsession. Don't keep falling for it, please. The political voice of the Left [the Peoples' voice] and the natural social values that spring from the Left have been suppressed and rejected by both parties of the governing Duopoly. When sociopolitical populist movements, inspired by Leftist Enlightenment, rise up outside the permitted political system in the US, and they threaten exploitive authority and profiteering of the industrial cartel — as was the case with union organizing and movements for labor laws — the Left was again swiftly crushed and many activist leaders were killed or imprisoned.

So, Medicare-4-All? On what planet do you suppose.

You can't fix it from the inside. It cannot be reformed. The Constitution is entrenched and can no longer be amended. Just observe it. See yourself in the system. Don't fall for the distraction. Don't get bamboozled. Accept the reality. That's the only way you'll see outside the box.