Also known as Walden, Jonas Mekas’s first diary film is a six-reel chronicle of his life in 1960s New York, interweaving moments with family, friends, lovers, and artistic idols. Blending everyday encounters with portraits of the avant-garde art scene, it forms an epic, personal meditation on community, creativity, and the passage of time.

The personal film archives of Yoko Ono were utilized for this feature-length documentary on the life of John Lennon. Predictably, it downplays Lennon's association with the Beatles and concentrates on his years with Ono. The film spends a lot of time recounting Lennon's anti-war activities, highlighted by a confrontation on a talk show hosted by conservative cartoonist Al Capp. The title of the documentary is, of course, taken from Lennon's idyllic ballad about a world free of hatred and discord. Imagine: John Lennon is a reverent but ultimately depressing chronicle of an artist who died the untimeliest of deaths.

A 1971–72 documentary film by Jonas Mekas. It revolves around Mekas' trip back to Semeniškiai, the village of his birth.

In 2007, Mekas took his filmmaking online, using his website Jonasmekas.com as the platform for a project called 365 Films, posting a new video each day for the entire year. Intended for "eye-pods" (as his May 31 entry puts it), many of these tidbits are created from now-archival film and video diaries years or decades old, while some employ content shot only days prior to posting. (...) Each daily dose is under 10 minutes (app. 30 hours in total), and their effect is collective; a years' worth of these forms a digital approximation of the monumental quality of his long-form films.

Not a documentary in the strictest sense of the word. Rather, it is a journey through the world of the artist Jonas Mekas - one of the exponents of independent U.S. movies; founder and director of the New York Anthology Film Archive.

A depressed woman, Barbara, is on the verge of suicide while a man she meets in a church and a married couple try to convince her that life is worth living.

In the winter of 2003, Legendary Filmmaker Jonas Mekas, moved out of his loft on Broadway, New York, where he had lived for the past 30 years. It was the place where he watched his children grow, and the art scene of Soho become what it was today. It was where Andy Warhol and Allen Ginsberg used to come by for film events and dinner. This film shows Mekas' transition in to a new life living in Brooklyn, and the adventures this entails. Discovering new friends, singing and dancing with his good friend Benn, and their adventures together. Mekas also faces what it is to live along again in Brooklyn, the place where he first lived when he arrived in New York as a misplaced person in 1947 after ww2. A film of Joy, friendship, wine, and song!

This correspondence, or exchange of letters and video diaries between acclaimed filmmakers Jonas Mekas and José Luis Guerin is extremely potent, there's sorcery at play in the mixture of the two. Together they're light and dark. Mekas knows life's joys, and is always a participant in what he films, Guerín is a detached observer, cold, present only as a black mote, reflected in the eye of one of his subjects. Guerín shoots in black and white and strives for formalism, Mekas loves hazard, loves his chaotic hand-held colour camera. Jonas Mekas felt that his images were inferior to those of Guerín, but a picture of his son Sebastian devouring a pickle, followed by Jonas on the deli sausage and wine, and then a cheeky close up of Goethe's Faust; which of them Faust and which Mephistopheles? That one shot set me thinking about the nature of art and the privilege of artists, and could be interpreted in any one of several fruitful ways.
Guerín's Camera is brutal, his viewpoint black, on death and distance. He sends Jonas a morbid video, regarding a Slovenian film writer, which is almost a provocation. One beautiful moment, filmed through a gap in his hotel room's curtains shows a young couple frolicking in the sea, for which brief segment he allows music. It's deliberately voyeuristic though, Guerín is distant he identifies with migrant workers he films in Venice.
The films, in an aesthetic sense presents clarity versus confusion, reality versus a dreamer's obfuscation. There's an extent to which what we see is a real correspondence, an extent to which they are talking past one another. Guerín intones that dialogue between filmmakers is an impossibility, over images of fish heads on ice in a market. It's one of two visual quotes I suspected are from Pere Potabella (from Pont de Varsovia).
The difference in viewpoint I suspect ultimately is that Mekas sees beauty in the fact that life goes on, wonder in impermanence, Guerín is blanched by it.