At the dawn of the 21st century, the music video was in a boom period: The TRL era was still at its zenith, CDs were flying out of the stores, budgets for music videos were still regularly in the seven-digit range, and MTV was the place you turned to in order to see the latest clips from pop’s best and brightest. Flash forward to 2018, and none of those things are true anymore. Album sales have been depleted by the rise of downloading and then streaming, MTV has been supplanted by the Internet as the video’s primary home, and attempts to reboot TRL only prove how different times are now than when Backstreet and Britney ruled the world. But with all that’s changed, the music video still reigns paramount in the pop world, as a conversation-starter, as a starmaker, as a cementer of legacy. Though the ways we consume music videos in 2018 would’ve been almost unthinkable at century’s start, the impact they have on our lives and pop culture remains relatively similar.  But of course, it’s been an interesting ride for the music video to get to this point: From the tail end of MTV’s peak to the introduction of YouTube and the minting of the vira...