It's a trailer for DLC for a game. Simple enough.
Borderlands 3 Moxxi's Heist DLC

Some new DLC came out today for Borderlands 3. This content is available now for the PC via Epic Games Store (affiliate link), PlayStation 4, and Xbox One. It is, of course, not available for the Google Stadia release of the game. Hey, maybe Stadia users will get it some time next year.

This DLC, entitled Moxxi's Heist of the Handsome Jackpot, and focuses on the player trying to seize control of Handsome Jack's space station. He's still dead (I think?) but his legend lives on.

Players must be at least level 13 in order to tackle this content. Enemies and encounters will obviously scale up to your level if you are a higher level than 13. You will also have needed to unlock Sanctuary III to travel to the new location.

About Moxxi’s Heist of the Handsome Jackpot
Moxxi’s recruiting you to seize control of a derelict space station built by the infamous Handsome Jack back when he was still president of the Hyperion corporation. The Handsome Jackpot is quite possibly the gaudiest gambling spot in the galaxy, with neon signs, slot machines, and gold statues all over the place. It’s also crawling with multiple models of deadly Hyperion Loader Bots, as well as lunatic looters who’ve been trapped on board ever since Jack’s death.

Key Features
  • Explore a glitzy new galaxy destination packed with unique zones worthy of Handsome Jack’s lavish lifestyle and dirty dealings;
  • Join Moxxi’s crew of eccentric characters and pull off the ultimate casino heist in a series of thrilling campaign missions;
  • Discover hidden secrets and strange happenings in The Handsome Jackpot via fresh side missions and Crew Challenges;
  • Get a blast from Pandora’s past when you battle the Hyperion forces that outlived Handsome Jack, including never-before-seen enemies and larger-than-life bosses;
  • Perfect your Vault Hunter’s gear loadout with all-new Legendary weapons and gear;
  • Expand your collection of cosmetics with even more customization items, including Vault Hunter heads and skins, weapon trinkets, an ECHO Device skin, and new emotes.