This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, speaking during an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, speaking during an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, posing for a photo after an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, posing for a photo after an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee (R), a former South Korean Navy special warfare officer, posing for a photo with a fan on a street in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, speaking during an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, posing for a photo after an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)

This picture taken on June 17, 2022 shows Ken Rhee, a former South Korean Navy special warfare officer, posing for a photo after an interview with AFP in Seoul. - A former South Korean Navy SEAL turned YouTuber who risked jail time to leave Seoul and fight for Ukraine says it would have been a "crime" not to use his skills to help. (Photo by Jung Yeon-je / AFP)