The video was released by the state-controlled outlet Russia Today. Whelan is shown in a prison uniform standing among other prisoners, operating a sewing machine and eating with others.
Andrii Pilshchykov, known as "Juice," died in a training flight Friday. He was a veteran of early combat missions during Russia's invasion and later advocated for Western countries to donate F-16s.
Russia's Investigative Committee said genetic tests confirmed that the head of the mercenary force Wagner, who led a short-lived armed rebellion, and two of the group's leaders were on the plane.
The Kremlin is dismissing allegations that Russian President Vladimir Putin was behind the apparent death of Wagner mercenary leader Yevgeny Prigozhin in a plane crash.
Yevgeny Prigozhin, leader of the Wagner mercenary group, appeared on the passenger list of a business jet that crashed Wednesday in Russia. Beyond that, little is clear.
A jet from Moscow to St. Petersburg crashed, killing all 10 people on board, officials said. Yevgeny Prigozhin was on the passenger list, officials said, but it wasn't clear if he was on board.
After a classmate was killed in his hometown of Bakhmut — the longest and bloodiest battle in Russia's war on Ukraine — a rescue worker volunteered to evacuate people from the front lines.