Use WEBM to MP4 - free
Frequently asked questions
Why would I need MP4 instead of WEBM?
Some editing software, older devices, and certain platforms don’t support WEBM, while MP4 is understood almost everywhere.
Is quality preserved?
There is a small quality trade-off from re-encoding between codecs, though it is typically not visible at normal viewing size.
How long does this take?
It depends on video length and your device’s processing power, since this is a full re-encode rather than a quick remux.