Why do I keep getting a failed export message: Video rendering error: -50

This error usually means that you have a corrupted video clip somewhere in the project. Try selecting all and pasting into a new project. If the new project doesn't share then try copying half of it into a new project and sharing that. If this works you know that the problem lies in the other half. Then split the half with the problem clip and sharing that .... and so on. This way you can eventually find where the problem clip is and replace it.

See also: error code -50

Geoff.