Seven Common Video File Problems and What Actually Causes Them
Video plays with no sound, will not open, is out of sync, or looks worse after editing. What is really going wrong in each case, and how to fix it.
Blog
Practical guides to working with video files: what actually controls file size, why a cut lands where it does, which codec or container to pick, and how browser-based editing works under the hood. Written for people who want the mechanism, not a list of buttons.
How a Video Editor Runs Inside Your Browser Tab
WebAssembly, FFmpeg and SharedArrayBuffer: how browser-based video tools process files locally, and what the approach can and cannot do.
How to Use Video Trim: A Complete Guide
Learn how to quickly and securely cut your video files directly in your browser using Video Trim. A step-by-step tutorial.
Keyframes Explained: Why Your Cut Doesn't Always Land Where You Set It
Why video editors sometimes shift your cut point by a fraction of a second, what keyframes have to do with it, and the trade-off between lossless and re-encoded trimming.
When to Trim Losslessly and When to Re-encode
A practical decision guide: which trimming method to use for social clips, archive footage, precise creative cuts and files you need to make smaller.
MP4 vs MOV vs WebM vs MKV: Which Video Format Should You Use?
What video containers actually do, how the four common ones differ, and how to pick the right one for sharing, editing, web embedding or archiving.
How to Reduce Video File Size Without Wrecking the Quality
What actually controls video file size, which levers to pull first, and why trimming a video does not always shrink it as much as you expect.
Trimming Video for Social Media: What Actually Matters
The durable rules for preparing short-form video for Reels, TikTok and Shorts, and which specifications are worth checking rather than memorising.
How to Trim a Video on iPhone or Android Without Installing an App
Cut video directly in your phone's browser, why it works, what the built-in tools do differently, and when the phone is the wrong device for the job.
Video Aspect Ratios Explained: 16:9, 9:16, 1:1 and 4:5
What aspect ratio means, which one to shoot in, and how cropping, letterboxing and platform re-framing actually affect your video.
Video Codecs Explained: H.264, H.265, VP9 and AV1
A plain-language guide to the four video codecs you will actually encounter, what each is good at, and how to choose between them.
Frame Rate Explained: 24, 30, 60 and Why Your Footage Looks Odd
What frame rate does to how video feels, why mixing rates causes stutter, and the difference between variable and constant frame rate.
Why You Should Edit Video Locally
Discover the privacy and performance benefits of cutting and trimming your videos directly in the browser instead of uploading them to a cloud server.