In the video you'll be seeing Sh. Umar Suleiman delivering a khutbah on an aayah from the Qur’an and on a hadeeth related to this aayah from Sahih Tirmidhi.
The khutbah is on how you should be thanking your Lord for the blessings and the comfort He has blessed you with. Many people around the globe don't enjoy what you have been given and you realize these blessings and favors of your maker only when you don't have these comforts or when you visit people that don't enjoy the comfort that you're enjoying. That's why you're asked to visit a sick because you realize what health is and what it means. That's why you're asked to visit the graves so that you understand the worth of life and so on.
Source
Allah Al A'la says in the glorious Qur’an - Surah 14, Aayah 34:
وَآتَاكُم مِّن كُلِّ مَا سَأَلْتُمُوهُ وَإِن تَعُدُّوا نِعْمَتَ اللَّهِ لَا تُحْصُوهَا إِنَّ الْإِنسَانَ لَظَلُومٌ كَفَّارٌ
And He gives you of all that you ask Him; and if you count Allah's favors, you will not be able to number them; most surely man is very unjust, very ungrateful.
