If you click on a user-uploaded segment of Helga that has not been age-restricted, you are not breaking any law in the US, UK, or EU. The film is explicitly educational, not pornographic (it lacks sexual arousal or intercourse simulation).
The answer is complicated:
In the vast archive of obscure mid-century cinema, few films have a backstory as strange and significant as Helga (German title: Helga – Vom Werden des menschlichen Lebens ). For modern viewers searching for the keyword "helga film 1967 youtube" , the journey is often one of surprise: What begins as a search for a vintage artifact often leads to a confrontation with post-war censorship, educational reform, and the very nature of what is "obscene." helga film 1967 youtube