Tanveer Bhai ... a few observations ..
This is the old type of Dynamat ... Now the new one is Dynamat Xtreme which is much more dense and effective than the original type of Dynamat.
The installer has covered the inner sheet metal ... this leaves the outer skin of the car vulnerable to vibrations caused due to the movement of the speaker in the door. He did not install DynaXorb which might have decreased the outer door vibrations to some extent.
The crutchfield installation method is what I followed. Dynamat recommends covering whole of the inner door surface without leaving the openings and ... only leaving the essentials ... I did not do that ... I covered only the sheet metal because sooner or later some installer and mechanic has to reach out inside the door for adjustments, etc.
The video showed cleaning of the surfaces with methylated spirit ... which is very important in all cars except for very new ones.