We're not entirely sure why you'd need to watch a seven-hour trailer in order to work out whether you fancy seeing a film that lasts for 30 days, but cancel your plans - one has arrived.

Swedish director Anders Weberg has released a second full-length trailer for his upcoming experimental film Ambiancé and it runs for a total of 439 minutes.

Weberg, who is also an artist, released a 72-minute long teaser trailer last year. He reportedly has an even bigger one due for release in 2018 (mark your calendars now) that will run for 72 hours.

The films to know about at Cannes 2016 Show all 14 1 /14 The films to know about at Cannes 2016 The films to know about at Cannes 2016 Julieta Director: Pedro Almodóvar

Starring: Adriana Ugarte, Emma Suárez

What's it about? The Spanish filmmaker's 20th film is based on three short stories from Alice Munro's 2004 book, Runaway which tracks a woman's search for her missing daughter. The films to know about at Cannes 2016 American Honey Director: Andrea Arnold

Starring: Sasha Lane, Kate Mara, Shia LaBeouf

What's it about? In British filmmaker Andrea Arnold's (Red Road) American road movie - her first film set and filmed outside the UK - a teenage girl who gets caught up in a whirlwind of hard partying as she crosses the Midwest with a band of misfits. The films to know about at Cannes 2016 Personal Shopper Director: Olivier Assayas

Starring: Kristen Stewart, Lars Eidinger, Nora von Waldstätten

What's it about? Stewart reteams with French filmmaker Assayas following Clouds of Sils Maria for this ghost story set in the fashion underworld of Paris. The films to know about at Cannes 2016 It's Only the End of the World Director: Xavier Dolan

Starring: Léa Seydoux, Marion Cotillard, Vincent Cassel

What's it about? Xavier Dolan (Mommy) returns with this film based on the play Juste la fin du monde which tells the story of a terminally ill writer who returns home after 12 years to announce his impending death. The films to know about at Cannes 2016 Paterson Director: Jim Jarmusch,

Starring: Adam Driver, Golshifteh Farahani

What's it about? An original film from Amazon Studios that follows Paterson, a bus driver in the city of Paterson, New Jersey who lives an inhibited life compared to that of his wife, Laura. The films to know about at Cannes 2016 I, Daniel Blake Director: Ken Loach

Starring: Dave Johns, Hayley Squires, Micky McGregor

What's it about? Written by Paul Laverty (the man behind Loach's Palme d'Or winner The Wind That Shakes the Barley, the film follows the titular protagonist, a joiner who seeks financial felp from the state following an illness. The films to know about at Cannes 2016 Loving Director: Jeff Nichols

Starring: Joel Edgerton, Michael Shannon, Marton Csokas

What's it about? Jeff Nichols' Midnight Special follow-up tracks an interracial couple based in Virginia sentenced to prison in 1958 for getting married. The films to know about at Cannes 2016 The Handmaid Director: Park Chan-wook

Starring: Kim Min-hee, Ha Jung-woo, Kim Tae-ri

What's it about? The Oldboy director's latest South Korean film follows an heiress who falls in love with a petty thief. The films to know about at Cannes 2016 The Neon Demon Director: Nicolas Winding Refn

Starring: Elle Fanning, Jena Malone, Keanu Reeves, Christina Hendricks

What's it about? Winding Refn's third consecutive film to compete for the Palme d'Or, this horror thriller follows an aspiring model who moves to Los Angeles where 'her vitality and youth are devoured by a group of beauty-obsessed women who will take any means to get what she has.' The films to know about at Cannes 2016 Café Society Director: Woody Allen

Starring: Jesse Eisenberg, Kristen Stewart, Blake Lively

What's it about? Woody Allen's latest will open the Festival. It is a New York romantic comedy set in the 1930s with a cast including Steve Carell, Parker Posey, Corey Stoll and Judy Davis. The films to know about at Cannes 2016 The BFG Director: Steven Spielberg

Starring: Mark Rylance, Rebecca Hall, Bill Hader

What's it about? Based on the Roald Dahl classic, the story follows a young girl named Sophie (Ruby Barnhill) who befriends a friendly giant. The films to know about at Cannes 2016 Money Monster Director: Jodie Foster

Starring: George Clooney, Jack O'Connell, Julia Roberts

What's it about? A money-oriented live TV show is interrupted when the presenter is taken hostage by a blue-collar worker compelled to turn to violence following his recent financial losses. The films to know about at Cannes 2016 The Nice Guys Director: Shane Black

Starring: Ryan Gosling, Russell Crowe

Reason to see: Shane Black (Kiss Kiss, Bang Bang) and his razor sharp wit return in a comedy set in 70s LA. The films to know about at Cannes 2016 Captain Fantastic Director: Matt Ross

Starring: Viggo Mortensen, Frank Langella, Kathryn Hahn

What's it about? In the forests of the Pacific Northwest, a father who devoted his life to raising his six kids with an irreverent education is forced to leave his paradise and enter the 'real' world.

The abstract non-linear film features two performance artists on a beach in southern Sweden - and that's about it. There are no cuts.

Described as a tale where “space and time is intertwined into a surreal dream-like journey beyond places," this film seems purely to exist for the most dedicated film enthusiasts. Will you sit through the finished product?