1. A method for forming a video output signal (So) from a video input signal (Si) using motion estimation (ME) and signal paths with different interpolation processing comprising motion compensated interpolation (MCI) in one signal path and fallback interpolation (FFI) in the other path, comprising the steps of: combining the output signals of the different signal paths (SSW) in relation to a measure of confidence (CF); forming the measure of confidence from a block based, minimum motion estimation error (BME) of the video input signal (Si).