The film Zulu started my interest in the whole subject, as it did for many people, when I first saw it nearly forty years ago!
I have read many books and accounts of the war and it is true the film is not totally accurate, but it is a piece of entertainment, not a documentary.
It was made at a time when there was little written about the war and as Stanley Baker, who stared and produced it was Welsh, he played up the Welshness of the regiment. It did not become the South Wales Borderers until 1881.
I recently read "Zulu": With Some Guts Behind It, The Making of the Epic Movie by Sheldon Hall and it is a fascinating study of the whole story behind the film with some excellent behind the scenes shots.
Another thing the film "misleads" people about is that the Zulus attacked in waves. From the first attack, to the the end of the battle, the attacks were virtually constant.
The Zulu war continues to fascinate me, as it just shows what happens when you underestimate your enemy, something that has happened numerous times in history with disastorous consequences.