Create a compatible viewing copy while retaining the source for editing.
Use the Video Converter alongside this illustrative example.
A practical example
A phone clip may open on your device but fail in a recipient’s application because the container and codecs differ. Convert a short representative portion first if you have one, then check the downloaded MP4 in the actual destination. Match the original frame rate where the available settings permit it rather than changing frame rate to chase a smaller file.
Check the result
Inspect an early frame, a late frame and a section with speech. A playable preview alone will not reveal audio drift or a colour change throughout the full clip.
Try a comparison
Compare a native-framerate export with a different-framerate copy of the same source. Look for duplicated or missing motion steps, not merely whether playback starts. Choose a change only when the destination or workflow requires it, and retain the original.
What this does not establish
Conversion can re-encode the picture and reduce quality. Retain the original; output compatibility and processing time depend on the source and browser.