Look at the title:
"Wide Awake" video gains plenty of praise and headlines

They may not be all the way constructive but they're still headlines. And from what you said, half of them are constructive, so basically making up what the title says.

Some of these are not necessarily praise - they're simply stating what it is (using dark tones, takes a look at love).

what is the video about ?

I'm proud of Katy, she is finally recieving good reviews from critics. Between the music video and the movie it has been too much.