Save the Green Planet!
지구를 지켜라! (original)
A young man believes that his country's leaders are actually toxic reptilian aliens sent down to launch a takeover of his beloved Earth. So he decides to abduct them and force the truth out on camera in his basement that doubles as a film studio and torture chamber.
Starring Shin Ha-kyun, Baek Yoon-sik, Hwang Jeong-min, Lee Jae-yong, Lee Joo-hyun, Ki Joo-bong, Kim Dong-hyun, Won Woong-jae, Kim Roi-ha, Lee Mu-hyeon
Watch "Save the Green Planet!" on Kanopy released in 2003. It's a comedy and drama movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.