Lots folks who have put full auto clips on the youtube are not in the US or in any country that strictly prohibits full auto weapon. However, there may also be an element of shear ignorance on part of folks who are in the US (or similar full auto restricted countries) that have placed such clips without thinking of consequences. May be nothing will happen, and may be they will run into some one who has tendency to report such action based on personal grudge, habit or being an anti-gun lobby. Personally, I would not want to associate with anyone from said categories.
It is a fine line when we speak of these actions because on one hand we are asking innocent questions and yet on the other hand we are giving undue attention to the subject that becomes fuel for the 'anti' group regardless of the fact the information for them is already there.
It is my 'personal' view that we should leave these issues as is, and let the river run its course. Educational discussion on ownership of legal firearms is good, but that should be without pointing out specific instances and should be in neutrality. This is just how I feel. I know it is very subjective view, but I fear that one fine day we will see 'antis' prevail and make it difficult for one to even own a legal weapon. That is there goal. They are unconcerned with sports, hunting, collection, or SD/HD aspects of the arguments; and it is very difficult to reason with them on any of these grounds.
There are countries which have slowly stripped their citizens from the firearms ownership rights such as UK, Malaysia, Saudi Arabia, etc. One can just hope that this right in universally protected around the world through various organizations. We should support them in our personal capacity and try to educate people on the use and ownership of firearms. I have met many people who were in past 'anti', but not they have some to reason and many of them now go out and shoot with and begun to understand it as sport and personal need.
One day at a time.