Combine Video Clips Into One Video With AI

To combine video clips in a normal editor, you import the files, drag each one onto a timeline, trim the start and the end, and repeat. For five clips that is fine. For fifty or five hundred clips from a trip, a shoot or a stock library, most of the time goes into search: which clip shows the beach, which one has the steady shot of the street, where in a two-minute take the good four seconds are.

The order is the second problem. When you put video clips together, the order should follow a story, not the file names. A good combined video shows the thing the voice talks about at the moment it talks about it. That is why this tool starts from a script. You say what the video should tell, and AI combines video clips in the order of that story.

First, create a project and pick 16:9 for YouTube or 9:16 for TikTok, Reels and Shorts. Then drop in all the video clips you want to combine. You do not need to sort, rename or trim them. Your browser compresses heavy footage to a light 1080p copy and uploads it, with the progress of every file on screen.

Second, paste the script of the combined video. The editor splits it into caption-sized phrases and times every word. Third, start the match. AI watches every clip once, notes what each part shows, and picks the best seconds for every phrase. A fixed assembler then puts the video clips together on the 30 fps grid at the pace you chose.

Last, read the timeline of the combined video. Every phrase lists its shots with the clip name, the source time and the length. When it reads well, render one MP4 with the voiceover and the captions burned in, and download it. The finished video is also saved in My Works.

Most tools that merge video clips simply place whole files end to end. That works when every clip is already trimmed and in order. Raw footage is not like that: a clip often holds a few good seconds between shaky starts and long pauses. Joining video clips whole gives you a long video full of dead air.

This tool combines video clips at the level of the shot. AI chooses a part of a clip for each phrase, cuts it to the length the pace calls for, and can come back to the same clip later at another shot size. It prefers steady footage, moves from wide shots to close-ups within a scene, and uses an unused second of footage before it repeats one. The result is one combined video that looks edited, not stacked.

The more of your story the clips cover, the better the combined video. Before you combine video clips, think about what each line of the script needs to show. Upload clips for every idea the script mentions, and several options for the ideas that come up often. Short, steady clips with one clear subject each are the easiest for AI to describe, to match and to merge.

Each clip can be an .mp4, .mov or .m4v file of any size, or a photo in .jpg, .png, .webp or .heic, which becomes a 4 s clip with a slow zoom. There is no limit on the number of clips in a project. For very large libraries we recommend the free desktop app for Mac and Windows, because the web editor gets slow with very many or very large files. If an iPhone .mov file fails, it is usually HEVC: try Safari, or export the clip as H.264 MP4. Clips stay in the project until you delete it, so you can add footage and put the video clips together again at any time.

The script is the order of the combined video: it decides how AI will put the video clips together. Write it in the order you want the viewer to see things: arrival, the first day, the highlight, the goodbye. Each phrase becomes one caption and one beat of footage, so short sentences give the clearest cuts.

Concrete words give the best matches. A line such as "We took the ferry at sunrise" points at a picture, while "It was amazing" could match almost anything. When no clip fits a phrase, the least used clip stands in as a filler, and the timeline marks it so you can add better footage and combine the video clips again.

The pace decides how often the picture changes. Fast gives shots of about 1.5 seconds, which keeps a short vertical video moving. Slow gives each shot up to about 4 seconds, which suits a calm recap or a documentary feel. A new pace matches the footage again, and the editor tells you before it does.

Pick 16:9 (1920 x 1080) for YouTube and the web, or 9:16 (1080 x 1920) for TikTok, Reels and Shorts. An AI voice reads your script in English, or you upload your own recording. Add music from the presets or your own file, and choose a caption style. Long videos render in parts of about a minute, so a change renders only the parts of the combined video it touched.

The editor runs in the browser, so you can combine video clips on a Mac, a Windows PC or a Chromebook with no app to install. Uploads need the tab open, because your browser compresses and reads every clip. After that, the server cuts and renders the combined video even if you close the page, and sends an email when it is ready.

On an iPhone, Safari reads the HEVC clips the camera records. See combine video clips on iPhone for the phone workflow. To turn clips into a YouTube video, see make a YouTube video with clips. For the full editor and its settings, open the AI B-roll editor.

Your first combined video is free: up to 60 seconds of script, 50 clips and one AI voice or your own recording. After that, each step uses purchased credits. Reading clips costs 1 credit per batch of 8 clips, matching is priced per part of the script, and rendering costs 2 credits per part of about a minute, plus 1 credit to join the parts.

To spend less when you combine video clips, upload only clips you might use, and settle the script and the pace before you match, because a change to either one matches again. A failed step is refunded and the finished work stays, so a retry pays only for what is left. When you need new footage rather than a way to put video clips together, make a clip with the AI video generator.