A PDF, a Word file, a screenshot, a photo of a whiteboard or a scanned page can be the source of a video. Pages with text are read directly; pages that are images are looked at and transcribed. If a page has no words in it at all, we say so rather than inventing them.
Before this, uploading either of them failed on the live site in every version that had shipped, and the error named the very format you had just given us.
Whiteboard draws in black on white the way its name always promised, the colour it used to have became a style of its own, and every style can now be looked at before you spend a video finding out.
The frames became a step you can look at before the video is made, one picture can be fixed without remaking the rest, and a scene can run as long as you tell it to.
Any video can be downloaded in any shape without being cropped, the styles in the app match the ones on the site, and minutes come back when a render does not happen.
Everything that changed, newest first.