Ran across the 2003 Criterion boxed set of these two companion movies for cheap, had to make the purchase. I knew that the first movie made a lot of money in 1968 and was the subject of an obscenity trial that went all the way to SCOTUS and overturned national obscenity laws.
But I had never actually seen the thing.
In the filmed introduction director (and star) Vilgot Sjöman explains he asked his producer for $100,000 to do a film in black & white with no script. It was to be entirely made up as they went along. Because this was 1967, he got the money.
So what you get is a lot of "man-in-the-street" interviews about politics, race and class. Some staged indoor scenes. And a couple of pretty tame (by today's standards) sex scenes.
In other words, incredibly amateur and incredibly boring.
The (blue) film is supposed to be unused footage from (yellow), the colors chosen to represent the Swedish flag.
This was supposed to be the start of a Swedish New Wave.
It didn't catch on in its native Sweden -- the politics was controversial, and nobody cared about the sex.