South Korea’s opposition party grilled unification minister nominee Kim Yung-ho over his controversial YouTube channel and repeated calls for regime change in North Korea, challenging his qualifications to manage inter-Korean ties in a contentious confirmation hearing at the National Assembly on Friday.

Democratic Party (DP) lawmakers on the parliament’s Foreign Affairs and Unification Committee mainly focused on Kim’s YouTube channel, where he repeatedly spread fringe theories predicting the DPRK’s collapse.

Kim, a scholar who previously served in the Lee Myung-bak administration, defended his decision to take down the channel around the time of his nomination earlier this month.

“I deleted