The video that you are talking about appears to have been made up from three, or more, sources.
The first scene was a close up of some kind of electrical launching device. It is definitely not part of a MADPAD or radar SAM launching system.
The second scene of a rocket in flight came from another source. I suspect that it was a free flight over ground un-guided artillery rocket. I heard and saw plenty of 122mm rockets just like that in Vietnam.
The third scene shows a smoke trail and an explosion. The smoke trail did not match the smoke trail from the second scene. This marks this as the third piece of video.
The final scene shows burning wreckage on the ground. I find this very unusual. If an aircraft had been shot down its crash site would had one, or more, quick reaction teams with air-borne support enroute within a few minutes. These teams are quick and sudden death for anyone who crosses them. There fore, staying around long enough to take video of the wreckage is not high on the list of survival traits.
Bottom line - some quick video editing to continue winning the public relations war. With all of the “buzz” it has received over the last 10 days it was well worth the effort.
The video of the wreckage is perfectly genuine. The Allison T56 engine is recognisable. The aircraft came down in a known hotbed of insurgency about an hour before darkness.