Before you add any videos, you need to tell NexusCut what kind of video you are making.

• Look at the top bar in the editor. You'll see an aspect ratio dropdown (usually defaults to 9:16).
• 9:16 is perfect for TikTok, YouTube Shorts, and Instagram Reels (tall videos).
• 16:9 is for standard YouTube videos or TV (wide videos).
• 1:1 is for square Instagram posts.
• Select the one you need. The black Canvas in the center will immediately change its shape to match.

You can't edit without footage! In the top-left corner (in the Sidebar), you'll see the Media tab.

The Timeline (the bottom half of the screen) is where the actual editing happens.

• Once your video is in the Media Library, click and drag it down onto the track labeled Video 1 in the Timeline.
• Your video is now a "clip" on the timeline. If you press the Play button (or Spacebar), you'll see it play in the Canvas above.
• To trim the beginning or end: Hover your mouse over the left or right edge of the clip until your cursor changes. Click and drag inwards to trim off the boring parts.
• To split a clip in half: Click on the spot in the timeline where you want to make a cut to move the red line (the Playhead) there. Then click the Split (Scissors) icon on the toolbar just above the timeline. You can now delete one half by selecting it and pressing Backspace/Delete.

Sometimes your video doesn't perfectly fit the Canvas (for example, if you imported a wide video into a tall 9:16 Canvas).

• Click on your video clip in the Timeline to select it.
• Look at the Canvas (the center preview window). You'll see a bounding box around your video.
• Click and drag the video to move it around.
• Grab any of the corner handles and drag to resize the video until it fills the screen perfectly.

This is where NexusCut shines. Instead of doing things manually, let our AI help.

• Auto-Captions: In the left Sidebar, click the AI Magic tab (the wand icon). Click "Generate Captions". The AI will listen to your video and create perfectly timed subtitles. You can click on these subtitles in the timeline to change their font, color, and style in the Properties panel on the right.
• Remove Background: Also in the AI Magic tab. Select your video clip, click "Remove Background", and watch as the AI perfectly cuts you out without needing a green screen! You can then drag an image or another video onto the timeline *underneath* your clip to create a new background.
• Magic Cuts: Uploaded a 10-minute long vlog? Click Magic Cuts, and the AI will analyze the video to automatically find and extract the most exciting 30-second highlight to turn into a short.

Want to add a big title or manual text?

• Open the Text tab in the sidebar (the "T" icon).
• Click Add Title or choose a preset style. A text clip will appear on your timeline.
• Look at the Properties Panel on the right side of the screen. Here you can change what the text says, pick a font, change colors, and add shadows.
• Drag the text on the Canvas to move it, and drag the text clip's edges on the Timeline to control how long it stays on screen.

Great video needs great audio. Here is how to manage it:

• Adjust Volume: Click any clip (video or audio) on the timeline. The Properties panel on the right will show a volume slider. You can turn the volume up, down, or mute it entirely.
• AI Voice (TTS): Don't want to use your own voice? Open the Audio tab in the sidebar. Look for the "AI Voice Generator". Type your script into the box, pick a voice actor (like Alloy or Echo), and click Generate. A professional voiceover clip will instantly drop onto your timeline!

Add some polish to your video by adding transitions between clips.

• Open the Transitions tab in the sidebar.
• If you have two video clips next to each other on the timeline, simply drag a transition (like a Fade or a Wipe) and drop it right between them. If you want audio on your transitions, you can add your choice of audio manually from the Audio tab.
• Open the Effects tab to find visual filters like VHS or Glitch, which you can drag onto any video clip to change its look.

Don't lose your hard work! NexusCut runs in the browser, so you should save your project to continue later.

• To save your current progress, click the Save Local button at the top of the editor. This will download a small project file to your computer.
• When you come back later to finish editing, simply click Load Local and select that project file. Your entire timeline, clips, and edits will instantly restore exactly how you left them!

Once you are happy with how your video looks and sounds when you press play, it's time to save it as a final video file!

• Look at the top right corner of the screen for the big Export Video button.
• Click it! A progress bar will appear.
• Our powerful cloud rendering engine will take all your clips, text, audio, and effects and bake them into a single high-quality MP4 file.
• Once it reaches 100%, the file will automatically download to your computer. You are now ready to post it to social media!