ClipTurn is a free Windows 11 app for fixing videos that were recorded sideways.
Rather than only changing an orientation flag and hoping every player, editor, and website respects it, ClipTurn physically rotates the stored picture. It builds a candidate locally, verifies it, and replaces the source only after the checks pass.
Use it from File Explorer with a right-click, preview one video in the app, or rotate a batch while getting an independent outcome for every file. When a faithful replacement cannot be proven, ClipTurn keeps the original untouched and explains the limitation.
No account, video uploads, telemetry, or codec settings to decipher.
Get ClipTurn: https://clipturn.app/
Microsoft Store: https://apps.microsoft.com/detail/9PGB9JVBRGLB
Quick tutorial: https://youtu.be/-_kdhLjnPy0