Six teaser videos, each featuring one of the band members, were released in the weeks leading up to the album's release on YouTube.
The videos started with various close-up shots of the band members hooked up to medical equipment and speaking.
[1] The videos then pan to a heartbeat monitor, play a short clip of the song, and displays the text "What is your Heartbeating for?"
Taecyeon's video mentioned the inclusion of seven members in the band,[1] although the seventh member (Jaebeom) exited the group before release of "Heartbeat."
The color palette is mostly blacks, greys, and whites.