Is this from the third film? Never saw that one. I think I made it through the second one.
To be honest, even the books get to be a bit of a slog in Return of the King. You can tell Tolkien had finally gotten to the stuff that interested him, and anyone who's read The Silmarillion knows that the more interested Tolkien was in his subject, the less interesting it is to everyone else. So you get endless, dry political timelines and lineages and descriptions of combat tactics and at that point I usually start feeling like it would be more interesting to read actual medieval European texts about similar stuff.
All the world building in the first book is where it's at.