I am so sorry I couldn't locate the video on google drive. It just didn't work, and came up with a 'page not found.'
I am wondering....could this be what is known as a 'reverse sneeze'? I think there are short videos on you tube of examples of reverse sneezes in dogs. Some dogs do it differently to others, but you might get the general idea.
If it IS that, it is harmless and very common.