Hi Borate. I did what you said. The result was the MP4 video appeared on the timeline. I could expand it and see the clips and subtitles, and the audio track. But on the storyboard view, I can see the individual clips only in clip preview or sequence preview, not on the storyboard line, and I cannot enter any clip to edit its effects, transitions, etc. Although I can see the subtitles sitting on the clips, they do not show up in the Subtitles tab. Am I missing some command that would open up the storyboard to allow editing as normal?