Rather tepid expose of 60's drug culture. At a conventional level, it's something of a warning to parents to sympathetically guide youngsters away from drugs and into the established mainstream. No mention is made of specific causes (Vietnam, racism, greed) motivating youth into countercultural norms. The visuals are relatively mild; no one is shown on a "bad trip", or at an ecstatic peak. It seems the message, such as it is, doesn't want to offend anyone, which is understandable in terms of finding a TV audience, especially a middle-class one. Then too, the mild tone may be a reaction to the ridiculous anti-pot films of the 30's, which by the 60's had no credibility. Trouble is that the message here comes across as too recessive to serve its purpose as a warning. I'm afraid that folks researching the 60's counter-culture won't find much of any depth.
(Too bad narrator Mitchum didn't add his own attraction to pot considering his 1949 arrest for illegal drug use. That would have been an interesting note.)