How We Verify

Accuracy is the entire point of Dual Media, so every number on the site goes through the same process before it is published — and gets checked again as platforms change. Here is exactly how that works.

Official documentation first

Every specification is sourced from the platform’s own help center or developer documentation, not from other blogs. When a platform publishes an exact figure — YouTube’s thumbnail size, for example — we use that figure and link the source. We treat third-party guides as leads to verify, never as authorities to copy.

When a number isn’t officially published

Platforms often don’t publish a precise pixel value for things like profile pictures. In those cases we use the best-supported, widely-confirmed figure, describe it as a recommendation rather than an official spec, and point you to where to confirm it. We would rather tell you “upload at least this, larger is safer” than present a guess as gospel.

Volatile specs get hedged, not faked

Some limits change almost monthly and conflict wildly across sources — video-length caps and AI-video generator limits especially. For those we never assert a single settled number. We explain the structure (in-app vs upload, free vs premium, per-clip vs extended), give the current reported range, date it clearly, and tell you how to check the live limit in your own account or the tool’s own docs.

Dated and re-verified

Each guide shows a Verified date. Platforms move their limits, rename settings and change crop behavior, so a spec that was right last year may not be right today. We re-check on a regular cycle and update the date when we do.

Corrections

If we get something wrong, we want to know. We correct errors promptly and note meaningful changes. Spotted something off, or a spec that just changed? Tell us via the contact page — reader corrections make the whole reference better.