Working with old Windows Movie Maker exports, corporate training videos, and Windows Media Center recordings
WMV files typically come from old Windows Movie Maker exports, corporate training videos, and Windows Media Center recordings. Converting to MP4 makes them usable in the apps and platforms that actually need them.
Publishing or sharing as MP4
The one format virtually every phone, editor, platform, and TV accepts without question, which is exactly why people convert WMV to MP4 before sharing, uploading, or editing.
Editing and production workflows
Video editors and producers convert WMV to MP4 to match the container their NLE, platform, or client actually expects.
Fixing playback on the destination device
A WMV file that won't open on a phone, TV, or web uploader often just needs its container swapped to MP4 — no other editing required.