Before you can edit a video, it helps to know what a video actually is. At its core, a digital video isn't one continuous moving picture. It's a series of still images, called frames, shown one after another so quickly that your brain perceives them as motion. It’s just like a flipbook.

Every frame is made up of tiny dots of color called pixels. The total number of pixels in a frame determines its resolution, which is just a measure of how detailed and sharp the picture is. More pixels mean a clearer image.

The speed at which these frames are displayed is the frame rate, measured in frames per second (fps). A higher frame rate generally results in smoother motion.

• 24 fps: This is the standard for movies. It gives a classic, cinematic look.
• 30 fps: Common for TV broadcasts and many online videos. It looks crisp and clear.
• 60 fps: Often used for video games, sports, and slow-motion shots. The motion is extra smooth.

Finally, all this information is bundled into a file, called a video format or container. You've probably seen these as file extensions like .MP4, .MOV, or .AVI. Think of the format as the box, and a special recipe called a codec tells the computer how to pack and unpack the video and audio data inside that box. For now, just know that .MP4 is the most common and widely supported format for the web.

Editing is where you shape your raw footage into a story. It’s less about complicated software and more about a few simple actions. The three most fundamental techniques are trimming, cutting, and merging.

Trimming is your first and most frequent edit. Most video clips have extra bits at the beginning (before the action starts) and at the end (after it finishes). Trimming lets you snip those unwanted parts off, leaving you with just the good stuff. It’s like erasing the "umms" and "ahhs" from a spoken sentence.

Cutting, or splicing, is slightly different. Instead of removing footage from the ends, you remove a section from the middle of a clip. This is useful for taking out a mistake, a long pause, or a boring part right in the middle of an otherwise great shot. You make two cuts—one at the beginning of the unwanted section and one at the end—then delete what’s in between. The software then stitches the remaining two pieces together.

Finally, merging is simply arranging your trimmed and cut clips into a sequence. You place one clip after another to build your narrative. This is how you combine an establishing shot, a close-up, and a reaction shot to tell a cohesive story.

Every video editing program has a central workspace called the timeline. It's a visual representation of your video from beginning to end, usually shown as a long horizontal bar. This is where you'll drag and drop your clips to trim, cut, and arrange them in order.

The timeline is organized into layers, or tracks. Imagine stacking sheets of clear plastic on top of each other. The bottom layer might be your main video clip (Track V1 for Video 1). On a layer above it (Track V2), you could place text titles or graphics. Because this track is on top, its content will appear over the video on the track below it.

Audio has its own separate tracks (often labeled A1, A2). You can have your main audio from the camera on one track, background music on a second, and sound effects on a third. Using layers gives you precise control over how all the different elements of your video—visuals, text, and sound—fit together.

With these basics—understanding your footage, knowing how to make simple edits, and organizing your work on a timeline—you have everything you need to start creating compelling videos.