How can I assemble phone clips with different orientations into one video?

Start by choosing where you expect to show the finished video and what shape suits that destination. Then choose a consistent project shape in your editor, if it asks. For every clip that does not match, make a deliberate framing choice rather than letting the first preview dictate the whole edit.

Usually the choice is between filling the frame by cropping some of the image, showing the whole clip with unused space around it, or using a background treatment if your editor offers one. These options can look quite different, so decide whether you value a full-frame look or preserving the complete original view. Make a short plan such as: “Vertical clips: keep the full image; horizontal clips: crop only if the subject stays visible.” Treat that as a starting rule, not a requirement to frame every shot identically.

Crop when filling the project frame matters more than keeping every edge of the original shot. Fit when losing any part of the image would hide useful action or context; the trade-off may be empty space or bars. In iMovie for Mac, Crop to Fill uses an adjustable frame constrained to 16:9, while Fit restores the clip’s original aspect ratio; Apple notes that fitting a 4:3 clip into the project can leave black bars at the sides. [S1]

For a vertical shot, check that a face, sign, or moving subject stays inside the crop as it changes position. If fitting leaves space, decide whether that looks acceptable in your video. A background-fill option may be available in some editors, but the cited iMovie Mac guidance does not establish a universal method for that treatment. [S1] Don’t assume menus or controls will be identical across apps.

Yes—work clip by clip. In iMovie for iPhone, clips can be rotated in 90-degree increments, rearranged on the timeline, and trimmed with yellow handles. Its separate zoom-controls guidance describes pinching and dragging to set the viewing area of a selected clip. [S2] Those are examples of controls in that app, not instructions that apply to every editor.

For each shot, check the orientation, whether the main subject is visible throughout the action, and whether the crop changes awkwardly between nearby clips. Play through the sequence rather than judging only a still frame. If a clip cannot keep both its full image and a full-frame appearance, choose which compromise suits that shot. The cited guidance does not establish a universal way to preserve every mixed-orientation clip without either cropping or empty areas. [S2]

Use this copyable plan, filling in the brackets for your project:

1. Destination and project shape: [platform or screen] / [shape].
2. Framing rule: [crop to fill / fit whole image / editor background option, if available].
3. Clip decisions: [clip name] — [orientation] — [crop, fit, or other available treatment] — [subject to keep visible].
4. Review: play the complete sequence; check the opening, transitions between shapes, and any moving subject near the edges.
5. Export check: watch the exported file in the intended viewing context and confirm the framing is still acceptable.

For example, as a hypothetical plan: “Project: [vertical social post]. Keep vertical clips fitted; crop horizontal clips only where the central action remains visible; review every crop and the full sequence before export.” Replace that assumption if your destination calls for another shape. If you plan to upload to YouTube, its guidance says the player adapts to the video’s aspect ratio and viewer’s device, supports vertical and other ratios, and advises against adding padding or black bars directly to the video. That guidance is specific to YouTube, not a rule for other platforms or editors. [S3]