In this scene, Taylor is pointing to the door telling a man to leave as she is angry at him. You can see the man trying to talk to the girl but she isn't listening. This represents a modern depiction of a woman showing anger towards a man and not accepting his attempts to communicate.

1. In this scene, you can see Taylor is pointing
to the door telling the man to get out. You
can tell from the body language that she is
angry at him and wants him to leave. Also,
in this, you can see the man trying to talk
to the girl but she isn’t listening to it. This is a
more of a modern representation of
women.

2. The people in animal costumes could represent her “
freedom” as she is seen dancing with her pyjamas on. The
fact that she’s not upset or depressed over her breakup
could show a modern representation of females, not caring
about the breakup and instead having a party to celebrate.
I think this song is targeted towards women and she's
showing them that she doesn’t need a man to be happy.

3. In this scene, you see the man calling her from a
party, and she is yelling down the phone, could
suggest that she doesn’t want the apology he
has for her. Also, she probably hears that
woman's voice next to him and gets really
annoyed and hangs up, and continues to party.

4. The title says ‘ Happy Days’ which
suggests that she's revisiting the good
days. Also, it could mean that she is
misses those days, and want to go
back to it.