Uh - I used to think that I was a stalwart defender of Elvis' more obscure movies from the 60s. For some reason, I'd always wanted to see 'Double Trouble' since seeing the LP cover as a teenager, when I first discovered the King. However - and I say this reluctantly as an Elvis fan - this film is appalling. As a comedy, it fails miserably with corny lines ('I think that I've just sat on the tea tray') and soon lowers itself into a sort of parody of the Tintin cartoons, once the 'plot' (if that's not too strong a word) moves to Belgium, with all its spies and jewel-thieves.
There are, however, two reasons why it is perhaps worth seeing (though not necessarily buying) this video. Firstly the film opens with Elvis performing in London - & even visiting his girl's uncle in St John's Wood, where he admires a Constable painting: an intriguing way to think of Elvis! Secondly, there are a couple of good songs (e.g. 'Double Trouble', 'I love only one girl', 'Long'Legged Girl'), though no justification can be had for the GHASTLY rock version of 'Old MacDonald had a Farm'.
So, 'Double Trouble' will trouble you unless you're a devoted Elvis fan! Sorry, Elvis!