Here is another scholarly lecture from fazilat ash-shaykh Maqsood ul Hasan Faizi hafezhullah. This lecture is all about the virtues mentioned in Noble Quran and in the Sunnah of Propeht Mohammed pbuh for Islamic Greeting i.e., Salaam. Most of the Muslims don't know that greeting and returning the greeting is of the rights Allah subhana wa taala has allocated upon eachother Muslim.
The etiquette and the ruling of Salaam is explained in depth. This lecture is recorded in 2004 at Masjid e Sara, Al-Ghat, Saudi Arabia.