How to analyze a baseball swing video on iPhone.
A useful hitting review does not begin with a verdict. It begins with a stable clip, one clear question, and the discipline to compare the same phase from the same angle.
1. Choose one question before pressing play
Start with a specific question such as whether the head drifts during the stride, the front side opens before contact, or posture changes through rotation. Reviewing everything at once usually produces vague feedback.
2. Use a clip that preserves the whole movement
Keep the hitter, bat path area, plate area, and enough space for the follow-through visible. A stable side view is useful for posture and sequence; a rear or front view can help with direction and alignment.
3. Find the phase instead of scrubbing randomly
Step through load, stride, heel plant, contact, extension, and finish. Phase labels create a shared vocabulary, but always verify the actual frame because video timing and body-pose estimates can vary.
4. Add one visible checkpoint
Draw a posture line, head boundary, hip-depth guide, shoulder line, or direction cue. A simple annotation is more useful than a screen full of marks that compete for attention.
5. Use the pose overlay as a guide
A pose overlay can make joint relationships easier to see, especially when clothing and background reduce contrast. Treat it as a visual aid; a missed or shifted joint should be corrected by looking at the original video.
6. Compare like with like
Use similar camera height, distance, zoom, and phase when comparing two swings. A difference caused by camera geometry is not a mechanics change.
7. Export the exact evidence
Share the marked frame or short clip that supports your question. Include the drill, pitch type if known, intent, and what you want the viewer to evaluate.