Please don't just trust me. If you have the video downloaded (full 16:55) go to 9:03 and slow down the video in VLC using "[". Watch the casing fall and dissapear. Then watch it again. Casings can be seen disappearing in this shooters firing position starting from 8:57 but can best be seen at 9:03. Any anons with the video link?
I wonder where else we can find bullet casings vanishing out of thin air?