Dylan Thomas's poetic flow is all that counts with 'Under Milk Wood.' Perhaps it could have been made poetic visually as well, but this effort doesn't prove it. In fact, the direction is pedestrian, and some odd liberties with the text (the scene in the barn with Burton & Davies getting it on with a woman, for instance) only makes things worse since it is the text that matters.
Then there is Richard Burton. No doubt that he would be THE actor for this film being a fellow Welshman like Thomas and a champion of the writer's work, but he is actually a bizarre presence in this film. He and Ryan Davies play a pair of wanderers drifting through town, their characters having little interaction with the folks, but Burton's character somehow has an omniscient knowledge of all of them. Burton doesn't speak on camera: his vocal performance is all voice-over narration. Ryan Davies never speaks a word on camera or off, as if he wandered in from a silent movie. Sadly, Burton strolls through the entire film with a goofy grin on his face, looking pale and drunk. And his wife Liz Taylor, handed a cameo, maintains her hideous late 60's makeup and renders herself unwatchable. But to be fair there are a lot of pretty women in this film and they are continuously slobbered over by a series of ugly Welshmen. The other featured star is Peter O'Toole as the blind Captain Cat. I admire this actor but he carries himself strangely in this film: he moves like a marionette straight out of the 'Thunderbirds.' Lastly, a weak music score doesn't help, especially with the lovely lyrics. Stick with the radio version.