ive seen it. thats like edited to make it like that lololol he hugs him for liek 5 secs to say thank u for joining. but they really didnt join vold. they betrayed him. Draco saved harrys life in a way. becasue earlyer (liek 10 - 20 mins before this) harry saves draco for no reason from a burning room that cant be put out.