Where MOV files come from
iPhone Camera app records in MOV (HEVC or H.264). FaceTime call recordings export as MOV. QuickTime screen recordings on Mac save as MOV. Final Cut Pro exports MOV by default.
The conversion workflow
Open Video to Markdown, drag the .mov in, click Convert, download the .md. Works the same as MP4 — the underlying audio is what matters.
iPhone tip: switch to Most Compatible
If you record on iPhone and want broader compatibility, Settings → Camera → Formats → "Most Compatible" produces H.264 in MOV/MP4 instead of HEVC. Both work for transcription; H.264 is just smaller and more universally supported across editing tools.