South Korea has blocked several videos featuring a new North Korean propaganda song praising Kim Jong Un that has proven unexpectedly popular outside the country, a move experts called “regressive” and damaging to democratic freedoms.

The Korea Communications Standards Commission (KCSC) announced in a press release on Monday that its Communications Review Subcommittee requested “corrective measures” by blocking 29 videos of the song “Friendly Parent” (or “Friendly Father”).

The video, first aired on state television in mid-April, depicted scenes from Kim Jong Un’s tenure as leader interspersed with visuals of exuberant soldiers and citizens showing their support for