An FBI complaint, citing screenshots from the video, asked that a warrant be issued charging Keller with knowingly entering a restricted building without lawful authority and attempting to impede an official government function.
Thousands of supporters of President Donald Trump stormed the Capitol during a joint session of Congress on Jan. 6 while lawmakers met to formalize the victory of President-elect Joe Biden.
Fact check: No, impeachment itself would not ban Trump from a 2024 presidential run
The 38-year-old Keller competed in the 2000, 2004 and 2008 Summer Olympics. He captured two golds and a silver as a member of the 4x200-meter freestyle relay, as well as a pair of individual bronzes in the 400 free.
Messages seeking comment left with Keller and his sister, former Olympic swimmer Kalyn Keller, were not immediately returned.
FBI warned of violent 'war' at Capitol before riot: Report