How Misleading Videos Are Trailing Biden as He Battles Age Doubts

President Biden has many adversaries in this year’s election. There are his Republican opponent, former President Donald J. Trump, and the independent candidate Robert F. Kennedy Jr.

And then there is the distorted, online version of himself, a product of often misleading videos that play into and reinforce voters’ longstanding concerns about his age and abilities.

In the last two weeks, conservative news outlets, the Republican National Committee and the Trump team have circulated videos of Mr. Biden that lacked important context and twisted mundane moments to paint him in an unflattering light. Among other things, they created the impression that the president:

A New York Times review of these videos found that some scenes were cut short and taken out of context, while other clips were cropped in a way that omitted crucial details when compared with additional footage.

Campaigns and political groups have long disseminated damaging videos of their opponents, sometimes misleadingly edited ones.

But the flurry of clips released this month is a fresh reminder of the steep, multifront and evolving challenge that Mr. Biden, 81, faces in convincing voters that he is spry enough to serve another term. As polls show a close race, many Americans harbor doubts about his fitness — and selectively sliced snippets from his routine public appearances are fueling those worries and sending conspiracy theories spiraling across social media.