The first shot of the gentle sea looks really terrible in 1920x1080. The clips are improved a bit by using compressor with motion adaptive set and scaled down to 1280x720. When paused, the artefacts look like horizontally elongated patches. In play mode they introduce a flickering effect, especially when the scene has a lot of contrast.
The clips were shot in manual movie mode, shutter speed 1/50, with circular pola filter, FHD setting ("1920x1080i25"), import in FCP on a ProRes timeline 1920x1080, export as said with compressor to 720p with motion adaptive set. The shot with the muddy river flowing was taken without pola filter and is a low contrast scene.
I would like to know if others have a similar experience!