When you say "gusta" is when you like a certain thing like food or something you like to do. When you say "gustan" is when you like a thing like a car ect.
Answer:
the first one says that Alberto heard the music the music from the part and left the house
the second one says Alberto heard the music from the party WHEN he left the house
Explanation:
I'm a Spanish speaker :)
como esta used =how are you
Tell me in English what you learn from the video and ill put it in a Spanish version that wont look like (google translate)