A new trailer for the latest installment of "Fantastic Four" was shown a day earlier than expected, thanks to a leaked video posted on YouTube. 

Anonymous YouTube account user lioonelx posted the leaked video ahead of the official release by 20th Century Fox. But the film studio took down the leaked trailer immediately before posting their version on their official website. 

Compared to the first trailer that was released back in January, the new one shows more action-packed scenes. All the members of the Fantastic Four are featured in the three-minute-long teaser video, namely Mr.Fantastic (Miles Teller), the Invisible Woman (Kate Mara), the Human Torch (Michael B. Jordan), and the gigantic Thing (Jamie Bell). 

Trailer viewers also get a brief glimpse of the film's main antagonist named Dr. Doom, portrayed by Toby Kebbell. However, fans of the comic book series will miss the Latverian gypsy that Dr. Doom is known for. In the new movie, he is a programmer who uses the pet name "Doom" as his online monicker. 

The official synopsis for the 2015 reboot of the "Fantastic Four" film franchise reads:

Fantastic Four, a contemporary re-imagining of Marvel's original and longest-running superhero team, centers on four young outsiders who teleport to an alternate and dangerous universe, which alters their physical form in shocking ways. Their lives irrevocably upended, the team must learn to harness their daunting new abilities and work together to save Earth from a former friend turned enemy." 

Josh Trank is tasked to direct the new "Fantastic Four" reboot, which is produced by Simon Kinberg, Gregory Goodman, and Matthew Vaughn. The film is written by Kinberg and Jeremy Slater. 

The new "Fantastic Four" film is expected to be released in the U.S. and the U.K. on Aug. 7, while the movie will open in Australia a day earlier.