Step by step
How to keep one section of a video
- 1
Choose a video
- 2
Review the start and end time
- 3
Record the selected clip
- 4
Download the WebM
What to expect
This compatibility workflow runs in real time, so a 20-second selection takes about 20 seconds to produce.
The output is re-encoded as WebM; it is not described as a lossless cut.
Quality and file behaviour
- The browser chooses an available WebM encoder; the output is a compatibility re-encode.
- Video alpha channels are not preserved by this released workflow.
- The selected section is re-encoded in real time rather than copied losslessly.
Common problems
- Some browsers cannot capture a playing video's audio and video tracks for local recording.
Frequently asked questions
Why does trimming take as long as the selected clip?
The released compatibility path records the selected playback in real time rather than loading a large conversion engine.
Will the downloaded video use the same format?
No. This workflow produces WebM using a codec supported by your browser and clearly labels the output before processing.