To zoom, simply toggle those values higher than 100% until you reach your desired zoom level. Under the “Layout” section, look for the “W” (Width) and “H” (Height) boxes. Click the “Show Clip Inspector” button along the right side of the video preview window to open the Clip Inspector panel. But if you find that your video now looks smaller than you want thanks to the addition of the black bars, follow the next two steps to zoom in on the important parts of your video. At this point, you’ve converted your video to horizontal and could skip to step 6 to save it as is. Select “Video Settings” > “Orientation” > “Landscape (16:9).” Now your video will have black bars on its sides so that it fits a horizontal frame. Hover your cursor over the video preview window to reveal the “Video Settings” button in the top right corner of the preview window.

You don’t need Descript’s transcription-based video editor to change the video orientation, but it's there if you want to make additional edits - and you can make them right in the transcript. Descript will then use AI to automatically transcribe your video. Next, either drag and drop the video file into Descript or click the “Choose a file…” button to import your video content into the software. Type in a name for your project and click “Create Project.” After you open Descript, click the blue “New” button in the top right corner and select “Project” from the drop-down menu.

Before you start editing, download and install Descript and then follow these steps. As a way around this, you can use Descript’s video editor to add black bars to the sides of your vertical video so that it fits a horizontal frame. But if you convert a video from vertical to horizontal you might end up having to crop off a huge chunk of the picture - not great.

Horizontal video is the optimal orientation for video viewed on TV screens, computer monitors, tablets, and YouTube. How to make vertical video horizontal using Descript

How to make imovie vertical