Donald Trump is a former president. Barack Obama is also a former president. Trump showed a video on the internet about Obama.
The video showed Obama being arrested by police in an office. But the video was not real. It was fake.
A computer made the video. This is called A.I., or Artificial Intelligence. The fake video looked very real.
Many people saw the video from the former president. It made people talk about what is real and what is fake on the internet.