Well if he been through it before than it must be bad!
Take it from me, I've been down that road and it was't good!
Did you know....
Drugs are the leading cause of death in the United States.
Huh... I never knew that before.
I miss him so much!
My son has just previously overdosed on drugs and i haven't been the same.
Oh no, I'm so sorry for your loss!
This is ethos because someone who has done drugs before is telling you not to take them. He knows how bad they can affect you so he's using his experience to persuade others.
This time the presenter gives facts about drugs. In this case he explains that overdose is one of the leading cause of death in the U.S. This fact persuades people not to take the risk of doing drugs.
In this scene the presenter tells his audience that his son passes away from the usage of drugs. And because of the emotional connection he had with his son he starts to cry which affects the audience as well. It makes them feel bad and see how much pain using drugs can cause to others around you.