How to Add a Circle to a Highlight Video in iMovie

The full Mac walkthrough — Keynote export, overlay mode, keyframes and the freeze — runs below.

The verdict before you start

On a Mac this is entirely doable and takes roughly three to five minutes per clip once you are set up. On an iPhone or iPad it is possible but painful, and the marker cannot be made to move. If you own both, do this on the Mac.

The reason a second app is involved comes down to what the ring has to be. You need a colored outline with nothing behind it, because a solid disc would cover the very thing a coach opened your film to judge. Keynote and Preview both come free on every Mac, and either will produce that file — Keynote is the more reliable of the two because its export dialog has an explicit transparency option.

From there iMovie treats your ring like any other still image. It can sit above a clip on the timeline, shrink down to the size of one player, and be dragged anywhere in the frame. Pair that with Modify > Add Freeze Frame and you get the pause-then-mark rhythm that recruiting film has settled on.

Mac: build the ring, then overlay it

The first three steps happen once in your life. The PNG you make here is reusable across every clip in this reel and every video you edit afterwards, so the ten minutes you spend on it is not a per-clip cost.

1. 1

   Draw an empty circle in Keynote

   Open Keynote, start a blank presentation and delete the placeholder text boxes. In the Format sidebar, open Appearance and set the slide background to No Fill. Insert a circle from the shape library, set its fill to No Fill as well, switch its border on, and pick a line weight heavy enough to survive being shrunk down to the size of a player.

   • Choose a color that fights your uniform instead of matching it — bright yellow and cyan survive most jerseys, while white vanishes on a sunlit field and black vanishes in shadow.
   • Draw the ring large on the slide. Scaling a big graphic down keeps the edge crisp; scaling a small one up does not.
2. 2

   Export it as a PNG that keeps its hole

   Choose File > Export To > Images, set the format to PNG, and turn on Export With Transparent Backgrounds. That option only does its job when the slide background is already No Fill, which is exactly why the previous step mattered. Save the file where you will find it again.

   • Preview can do the same job: open any image, click Shapes in the Markup toolbar, draw an oval, then set Fill Color to the swatch with the diagonal slash and choose a Border Color.
   • Keep this file forever. Every future clip and every future reel reuses it.
3. 3

   Check the photo settings before you import anything

   Open iMovie's settings and find Photos placement. Apple offers Fit, Crop to Fill and Ken Burns; if yours is on Ken Burns, every still you add gets an automatic slow zoom, which will make your ring creep and swell across the shot for no reason at all. Set it to Fit. Glance at Photo Duration while you are there, because that number decides how long your ring lasts when it first lands.

   • Settings changes apply to projects you start afterwards, not to one already open, so change this first.
4. 4

   Drop the PNG above the clip you want to mark

   Bring the PNG into your project, then drag it from the browser onto the timeline so that it lands directly above the clip that needs the marker, releasing when the green plus appears. Landing it above the clip rather than beside it is what tells iMovie to treat it as an overlay instead of a new scene.

   • Line the left edge of the still up with the frame where the ring should appear.
   • Drag the right edge inward to shorten it. A ring that hangs around for four seconds has stopped pointing at anything.
5. 5

   Switch the overlay mode to Picture in Picture

   With the PNG selected, click the Video Overlay Settings button above the viewer, open the pop-up menu on the left, choose Picture in Picture, and click Apply. Your ring becomes a floating layer on top of the footage, and the transparent middle lets the play show through.

   • The same controls carry a border option. If iMovie has drawn a frame around your overlay, turn it off there — a boxed ring looks like a mistake.
6. 6

   Shrink the ring onto your body

   Drag any corner of the overlay in the viewer until the ring sits a little wider than one body, then drag its middle onto yourself. Yellow guidelines will offer to snap the overlay to the middle of the frame; ignore every one of them, since a marker belongs wherever you happen to be standing.

   • Ring the torso rather than the head. A circle drawn around a head reads like a mugshot, and it crops away the stance and footwork a coach came to judge.
   • Leave daylight between the ring and your outline. A marker pressed against your shoulders is a marker sitting on top of the evidence.
7. 7

   Keyframe the position so the ring travels with you

   Put the playhead on the overlay's opening frame, select the overlay, and click the Add Keyframe button in the viewer. Now roll forward, pull the ring back over your body, and iMovie fills in the travel between those two marks. Do that again wherever the gap between you and the ring becomes obvious, then click Apply.

   • Two or three keyframes per second of running is plenty. Beyond that you are animating rather than marking.
   • Understand what this is: iMovie is not watching the player, it is drawing a straight line between positions you set by hand.
8. 8

   Add the pause and check it back

   Stop one beat ahead of the moment you touch the play, then choose Modify > Add Freeze Frame. The hold Apple gives you runs three seconds, far more than recruiting film wants, so drag its edge in to somewhere near one and confirm your overlay still spans the frozen stretch. Then run the clip at full speed and watch where your own eye goes.

   • Watch it once without pausing. If you cannot find the marked player instantly, neither can a coach with twenty more videos to get through.

What this really costs in time

Budget an hour for a twelve-clip reel and you will be about right. Each clip runs three to five minutes once the PNG exists: drop it in, set the overlay mode, scale it, position it, keyframe it, add the freeze, watch it back. Multiply that honestly before you decide, because the arithmetic is what catches people out rather than any single step.

The second tax is precision. The overlay is positioned by dragging in the viewer, and there are no numeric coordinate fields to type into, so every clip is eyeballed. Ring sizes drift between clips, which a coach will not consciously notice but which makes the reel feel homemade. If consistency matters to you, size the first ring carefully and then copy and paste that overlay into later clips rather than starting fresh each time.

The third is that keyframing a marker onto a moving athlete is genuinely fiddly. A player running a diagonal across a wide press-box shot needs a keyframe every half-second or so to stay ringed, and every one of those is a drag-and-check. Most people who try it once settle for a static ring during a one-second freeze, which is the effect described on our guide to the freeze-frame effect in highlight video — and it is the right call, because the pause is what does the work.

On iPhone and iPad

It works, and it is worse. iMovie for iOS carries the same overlay modes as the Mac version — cutaway, split screen, green screen and picture-in-picture — and Apple's iPhone documentation states that photos as well as video clips can be added as overlays. So the transparent-PNG trick does transfer to a phone.

The documented sequence is short: tap the Add Media button and choose your image, tap the More button, and pick Picture in Picture. From there the Position Control button lets you drag the ring around and pinch it to size, and a Border button strips off the frame so only your circle shows. Getting the PNG onto the device is the real chore — Keynote for iOS can make it, or you build it on a computer and send it over, and either way you are opening the Files app mid-edit.

The bigger limitation is movement. Apple's iPhone overlay documentation describes position, border and zoom controls, but no keyframe button appears in it, so plan on the ring staying exactly where you put it for the whole time it is on screen. That is fine over a one-second freeze and useless over a ten-second run.

The honest recommendation, then: if there is a Mac in the house, use it. If the phone in your pocket is the only computer you have, iMovie is the wrong app for this one job — CapCut handles a moving marker on a small screen far better, and CircleOn skips the marker-building entirely.

The fast path: skip the PNG entirely

If what you actually need is a coach finding you at the top of every clip, there is a much shorter road. CircleOn is a browser tool built around this single effect: paste in a link to your film, click your own position wherever a viewer would otherwise have to search, and it renders an MP4 in which the picture stops for roughly 1.2 seconds with an animated ring sitting on you.

There is no graphic to build, no overlay mode to set and no keyframes to babysit — clicking on the player is the entire interaction, and processing happens on CircleOn's servers while you do something else. A reel that would be an evening of iMovie work usually lands in about five minutes. What you give up is control, which is a real trade rather than a rhetorical one; our pillar guide on circling a player in a highlight video puts the manual, automatic and Hudl routes side by side so you can see which side of that trade you fall on.