No. Premiere does not really support MKV, and the honest answer is annoying. The industry-standard editor has never properly imported it. People online will tell you they got one in once. Once is not a workflow.
- It is a product decision, not a technical limit: professional tools prioritize professional formats, and MKV gets filed under enthusiast stuff. - Several other big editors treat MKV as a second-class citizen too. - Check the supported formats list for the containers you actually shoot in before committing. Five minutes, saves the 2 AM forum spelunking. - The fix is two minutes: remux the MKV into MP4 with HandBrake or Shutter Encoder, zero quality loss, import normally.
Keep one converter installed and the problem leaves your life. And if you are converting because you want clips for social, ReelCut skips the dance entirely and delivers finished shorts for $4.99 a video.