On the main interface of the program, drag the files you want to edit to the Media zone. Or you can also click on the “Import” button to add the file. Drag and drop the clip to the video track, right-click on it and choose “Edit”. An window will show in which you can rotate icons to change the video to landscape.
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Frequently Asked Questions
How do I rotate a video 90 degrees in Premiere 2020?
0:215:19How To Rotate Video In Premiere Pro CC 2020 - YouTubeYouTube