Check the file against every destination before scheduling. Inktaro flags incompatibilities instead of silently cropping or trimming the video.
Use the clean file from your editor rather than a copy downloaded from another social network. That avoids carrying another platform's watermark and avoids starting from an already re-encoded copy.
When you compose a post, Inktaro reads the video's technical properties and compares them with the selected destinations. The important categories are format, duration, file size and resolution. Platform rules can differ, so the result is evaluated per destination rather than treating “vertical video” as one universal format.
Inktaro tells you before publishing. It does not crop, trim or otherwise change the creative without asking. Fix the source in your editing tool, export a new file, then check it again.
A valid file can still fail if an account is disconnected, a permission has expired or the platform is temporarily unavailable. Compatibility checking removes file problems early; publishing status handles what happens after the upload starts.