This has been my favourite song from this summer:
It's "Omen", by British duo Disclosure, with Sam Smith featuring. The music video is a follow-up to Disclosure's video for the song "Holding On", which features Gregory Porter on the vocals, and the "Omen" video notes a "To be continued" at its end.
This is the second collaboration between Disclosure and Smith, the first being "Latch". "Omen" is by far my favourite song from both artists; while I haven't listened to "Omen" as much for the past couple of weeks, during the summer I heard it on multiple occasions. It's an amazing track.