How to Add Music to a Video: 4 Methods Compared

Start With the Rights, Not the Track

The most expensive mistake in this whole process is choosing music first and checking whether you can use it afterwards. A track that sounds perfect is worthless if using it gets your video muted, demonetized, or pulled. Before you audition anything, write down three things: where the video will be published, whether it will make money directly or indirectly, and whether it was made for a client. Those three answers decide which of the methods below are even available to you. Personal use, monetized channel content, paid advertising, and client work are four different permission levels, and almost every licence treats them differently.

Method 1: Music You Already Have Rights To

If you have commissioned music before, bought a perpetual licence, or your organization has a brand sound, this is the cheapest option and the one most people forget. The catch is scope. A licence bought for one campaign usually does not extend to the next one, and "we already paid for this" is not the same as "we can use this anywhere forever." Check the original licence for its territory, its term, and its permitted media before reusing anything.

Method 2: A Stock or Subscription Music Library

This is the default for most creators: a catalog of pre-made tracks you search by mood, genre, or tempo. Libraries are fast to start with and genuinely useful when the music only needs to sit politely in the background. The costs are subtler than the subscription price. You spend real time auditioning tracks that were never made for your video. You are licensing music other projects are also using, so a track can end up attached to a competitor's ad. And the track's structure was decided before your edit existed, which means the fitting work in the next section falls entirely on you.

Method 3: Commissioning Original Music

A composer writes music for your specific video. The result fits better than anything else on this list, because a human watched your edit and wrote to it. It is also the slowest and most expensive option, with lead times measured in days or weeks and a brief-and-revision cycle attached. For a flagship campaign, a title sequence, or a brand's signature sound, it is usually worth it. For the eleventh social cut this month, it is not.

Method 4: Generating an Original Score From the Video Itself

The newest option inverts the search problem. Instead of describing what you want and hunting for the closest match, you hand over the video and get music composed around it. A tool like Musikai's PostScore analyzes the video you upload — its section structure, its energy, its emotional arc — and generates original scores built to follow it. You are not picking from a catalog, so the result is not a track anyone else is using, and it arrives already shaped to your pacing rather than needing to be forced into it.

The Step Everyone Underestimates: Making It Fit

Whichever method you choose, there is a step between "I have a track" and "the video is done," and it is where the hours go. A three-minute library track on a forty-second cut needs trimming, and the trim has to land somewhere musical. The energy needs to lift where your video lifts. The ending needs to resolve rather than stop. Editors solve this by looping sections, crossfading, time-stretching, or — most often — quietly recutting the video so it matches the music. That last one is worth naming plainly: with library music, the video frequently ends up serving the track. Methods 3 and 4 are the only two where the music serves the video.

Adding the Music in Your Editor

The mechanics are similar everywhere. In Premiere Pro, drag the audio to an A track, then use the rate stretch tool or razor for length. In Final Cut Pro, attach it to the primary storyline so it moves with your clips. In DaVinci Resolve, do the work on the Fairlight page where you get real audio tools. In CapCut or a phone editor, the audio track sits under the video track and you trim with handles. In every case: set your music level roughly 12 to 18 dB below dialogue, and duck it under any voiceover rather than fighting it with EQ alone.

Which Method Should You Use?

If the video is personal and unpublished, use anything you have the rights to. If it is routine content — social posts, internal video, filler b-roll — a library subscription is efficient and you should not overthink it. If the video is a flagship piece and the budget and timeline exist, commission a composer. If you need music that fits a specific edit, repeatedly, on a normal schedule and a normal budget, generating an original score around the video is the option that did not exist five years ago and is usually the right answer now.

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