The quick answer
To make a reaction video on iPhone with ScreenDuo, open a video saved in Photos or Files, record your camera and commentary over it, then edit the camera layer and export the finished MP4. ScreenDuo can blur or remove the room behind your camera. It works with a local video; it does not fetch a stream URL or find streamer highlights for you.
This workflow is for a reaction with a point: explain a gameplay decision, compare a creator’s claim with evidence, or show what surprised you and why. A face over a clip alone gives the viewer little reason to stay.
Choose a video you are allowed to use
Start with your own footage or a video you have permission to reuse. If a platform provides an official save or export option for the material, use that and check its terms. A public YouTube or Twitch link is not a reusable video file or permission to republish it.
ScreenDuo plays video from Photos or Files while you record your camera over it. If you are reacting to a creator’s stream, obtain a permitted clip from the creator or use the platform’s allowed tools to prepare the source before opening ScreenDuo. For a screen recording that already exists, see how to add a facecam to a saved recording.
Before you record, watch the source once and write down the one idea your reaction should add. Note two or three moments that support it. That gives your commentary a beginning, a reason to pause, and a clear ending.
Record your reaction over the saved video
- Open the permitted source video. Choose it from Photos or Files as the footage for your camera pass.
- Check your framing and sound. Put light in front of you, wear headphones to hear the source without feeding it back into your microphone, and record a short test.
- Explain what the viewer should notice. Comment on a decision, detail, or claim. Pause when you need to make a point; avoid leaving long stretches where the source plays without your response.
- Play the recording back. Check that your explanation lands on the moment you meant to discuss before recording a longer take.
ScreenDuo keeps the source and camera as separate editing layers. You can change the camera placement after the recording instead of baking the layout into the source video.
Arrange the camera and remove its background
Open the recording in Edit and move or resize the camera so it does not cover game controls, subtitles, or the detail you are explaining. Choose a vertical or widescreen canvas to suit where you plan to share the video, then check that important text remains readable.
In the camera background control, choose Remove to show the canvas behind you, or Blur to keep the room softly visible. ScreenDuo version 1.2 lists background removal in Edit on iPhone, iPad, and Mac. You do not need a physical green screen for this cutout effect.
Review the moving preview around your hair and hands. Lighting and background detail can affect the cutout. Removing the camera background reveals the canvas; it does not make the exported MP4 a transparent video.
Check the sound, then export
Listen with headphones to the source and your voice together. Lower competing source audio where it makes the commentary hard to understand, and keep only audio you are allowed to publish. If the original file already combines music, game sound, and someone else’s narration, those parts may not be separable.
Trim the start and end, watch the full exported MP4, and confirm that the camera, source picture, and commentary stay in sync. Keep the editable ScreenDuo project if you expect to make another layout; the exported MP4 is the flattened version for sharing.
For a tutorial where you narrate screen actions instead of reacting to another video, see the screen-recording voiceover workflow.
Will a facecam make the reaction video monetizable?
No single layout guarantees earnings. YouTube lists reaction videos with commentary among examples that may meet its reused-content policy, but it reviews the channel and the video still has to follow other rules, including copyright. A camera overlay does not by itself give you rights to the source or make a minimally changed repost original.
Check the source owner’s terms and the destination platform’s current rules before publishing or taking paid work. ScreenDuo helps you record and edit your response; it does not license clips, find paid clipping campaigns, or guarantee views or revenue.
Common questions
Can I react directly to a YouTube or Twitch URL?
This workflow starts with a video saved in Photos or Files. ScreenDuo does not download a stream or create a Twitch clip. Prepare the source through a method you are permitted to use before recording your reaction.
Does background removal export a transparent overlay?
No. Remove reveals the canvas behind the camera while you edit. The shared MP4 includes the final canvas and camera composition.
Can I make a reaction without talking?
You can record a camera layer without commentary, but a silent face reaction may add little original value. YouTube’s reused-content guidance specifically distinguishes commentary reactions from mostly non-verbal reactions. Copyright and other rules still apply.
Make the reaction your own.
Bring in a video you can use, record your commentary, then choose the camera layout and background in Edit.
Try ScreenDuo on iPhone