This appears to be a technical or categorical tag. "Indo" is short for Indonesia, while "18" can sometimes refer to age-gating or, more likely in this context, a specific year or a content category code used by certain media aggregators. "Fixed" often implies a stabilized video edit or a "finalized" version of a trending clip.
This article unpacks the viral sensation, the controversy, and the resolution that has set a new standard for content creators in the region. This appears to be a technical or categorical tag