The phrase "a long trailer" is correct and usable in written English.
It can be used to describe a trailer that is extended in length, often referring to vehicles or film previews.
Example: "The movie was so popular that they released a long trailer to build anticipation for the sequel."
Alternatives: "an extended trailer" or "a lengthy trailer".
Her classroom is in an annex, a long trailer portioned through the schoolyard to accommodate the urban population boom.
He was walking from his quarters — a long trailer containing twenty single rooms, each with a flat-screen TV mounted above the bed — to the chow hall.
An average film student could compile a long trailer of erotic food scenes to match the catalog of censored kisses in "Cinema Paradiso".
It was pulling a long trailer bed with high walls the color of rust, on top of which Arto Lindsay's musicians and Valgeir were playing.
Valentino's whole filmography seems the corpus of a corpse, and one can't now view it, or finish this book, without feeling that all the films were somehow a long trailer, a preview of his apotheosis in the open casket at Frank E. Campbell's, where seventy-four viewers per minute, fifty thousand by the end of the first day, found him ready for his closeup.
When you can cause that kind of commotion just by showing a long trailer, it's worth taking notice.
A minute and a half long trailer for the video discussion, which is set to debut on Mother's Day 2012, May 13, reveals Banfield-Jones' feeling that she was "not a good mother" to Pinkett-Smith and Willow's concern that the family does not spend enough quality time with one another.
The clip, in the form of a one minute and a half long trailer is of course being produced by Walt Disney Pictures and directed by Iron Man/The Jungle Book director Jon Favreau.
Last week, "Temptation Island," often resembled a movie house with an especially long trailer, as clips for films like "Valentine," "Snatch," "Sugar and Spice," "Hannibal" and "Saving Silverman" rolled by.
Here's an audaciously long trailer.
Wednesday's minute-and-a-half-long trailer for the Tim Burton remake feels a bit like Big Fish cut with a sizable share of The Greatest Showman and a CG elephant thrown in for good measure.
