Journalist Richard Medhurst arrested at Heathrow Airport under terrorism act

Richard Medhurst a journalist YouTuber released a video saying he was "arrested" under terrorism act in Heathrow airport, escorted from the plane. He speak about his experience in length in a video on his YouTube channel at:

https://youtu.be/QYa-cb7MzIo?si=EbJ6TPD73VPkyOrg