This three-part BBC adaptation of author Anne Brontë’s novel The Tenant of Wildfell Hall features Tara Fitzgerald as Helen Graham, a pensive woman seeking a way out of her miserable marriage to Arthur Huntingdon (Rupert Graves), a rakish alcoholic who tricked Helen into marrying him before his bad behavior became outwardly evident. Meanwhile, farmer Gilbert Markham (Toby Stephens) becomes increasingly attracted to Helen, whom he is led to believe is a widow.
This usually ranks in the top 10 of favored films.
There was no original trailer for this film, but there are a few fan made ones, and I believe you could find the entire movie on youtube.
Here is a sample