Promotion...

While watching Avicii 'Wake Me Up', I noticed that the music video promoted the Xperia Lounge during the concert featuring Avicii. This helps to promote the phone to its target audience, for example when they take the picture, it's obvious that the phone is aimed for teenagers.
Also by 'tattooing' Avicii's sign on the girls arm's promotes his new songs and makes him an icon that everyone will remember.
Also its just one of the new videos from this year that include the directors names, this isn't common for an average length music video and is seen more in 7 minute ones. Also, a possible reason why the directors name's are at the end, is because the concert footage was incorporated into the music video itself.

By using the phone it suggests that its appropriate to take in a certain environment (concert), as it won't break or fall. The use of branding in the video is a way for the director to promote his artist and his image. By cutting to close ups of Avicii's logo,it is imprinted in the audience so that there will be word of mouth promotion.