OAKLAND, Calif. — YouTube said on Tuesday that it had suspended President Trump’s channel over concern about “ongoing potential for violence,” the latest move by one of the large technology companies to limit the president online.

In a post on YouTube’s official Twitter account, the Google-owned video site said it had suspended Mr. Trump’s account after one of his recent videos violated its policy for inciting violence.

That meant Mr. Trump would not be able to upload new content to his channel, which had about 2.8 million subscribers, for at least seven days. YouTube also said it was disabling all comments on his channel indefinitely.

Older videos that did not violate any policies remained active on his channel.

Many tech companies have moved to curtail Mr. Trump online since a violent mob of his supporters, urged on by the president, stormed the Capitol last week. In the aftermath, Facebook suspended the president from Instagram and its core social network through at least until the end of his term. Twitter followed by permanently banning Mr. Trump’s account from its service, depriving him of his favorite social media platform, where he had more than 88 million followers. Other sites, such as Snapchat, Reddit and Twitch, clamped down on Mr. Trump.

Big tech companies have also withdrawn support for other sites that have hosted right-wing content. On Monday, Parler, a social networking site that had become popular among Trump supporters for its loose approach to freedom of speech, went dark after Amazon pulled its computing services. Apple and Google earlier had removed Parler from their app stores. Parler has said it is searching for a way to get back online.

The moves have won praise from liberals and others who said the actions were long overdue because Mr. Trump had used the sites to spread falsehoods and incite violence. But conservatives have said that the tech companies censored Mr. Trump and suppressed right-wing voices, raising questions about how much power the tech companies have over online discourse.

The video that prompted the YouTube suspension came from Mr. Trump’s remarks on Wednesday before a trip to Texas to visit a partly completed portion of his long-promised wall along the Mexican border.

In his first address to reporters since last week’s events, Mr. Trump said that a speech he had made at a rally before the riots at the Capitol was “totally appropriate” and that an effort by Congress to impeach and convict him was “causing tremendous anger.”

The seven-day suspension from YouTube was an “important and necessary first step” that should become permanent, said Jim Steyer, chief executive of Common Sense Media, a nonprofit news media watchdog group. “While it is disappointing that it took a Trump-incited attack on our Capitol to get here, it appears that all the major platforms are finally beginning to step up,” he said.

During his presidency, Mr. Trump has used YouTube differently from Twitter or Facebook. His YouTube channel is filled mostly with clips from speeches and rallies, as well as videos of supporters defending him on Fox News. The videos lack the punch of his minute-by-minute commentary on Twitter and Facebook.

YouTube’s suspension comes after months of foot-dragging by the company. In the weeks after the Nov. 3 election, Mr. Trump’s channel was filled with videos showing him and his supporters challenging the outcome. YouTube refused to act on those videos even as critics called on it to do so, saying that questioning the election results was not a violation of its policies.

Last month, after most states certified their election results, YouTube said it would start removing videos that misleadingly said there had been widespread voting fraud or voting errors. But the company said that it would not penalize channels for posting such content with suspensions until Jan. 21, after Inauguration Day. YouTube said it had removed thousands of videos spreading misinformation about the 2020 election.

It removed several videos from Mr. Trump’s channel last week, including the one where he praised rioters and urged them to leave the Capitol. The company cited the spread of election misinformation.

A day later, YouTube eliminated the grace period and said it would start issuing “strikes” against channels for policy violation regarding election fraud. Channels that receive a strike are prevented from uploading new videos for a week. After three strikes, a channel can be permanently banned from YouTube.