New Brow: Contemporary Underground Art is a captivating 2009 documentary offering audiences an in-depth and intriguing glimpse into the world of underground art, more specifically the Lowbrow or "Pop Surrealist" movement. This entire movement is akin to a subversive rebellion against the predominant conventions of high art, influencing and allowing an explosion of self-expression on the creative front. Incredibly directed by Tanem Davidson, New Brow is a riveting exploration of out-of-the-ordinary creativity, portraying its intriguing beauty and artistic innovation.

The unique feature of New Brow is its assembly of brilliant minds from the world of underground art. It highlights the profound works and experiences of acclaimed artists such as Van Arno, Anthony Ausgang, and Glenn Barr. It propels viewer into their extraordinary creative worlds, exploring their contexts, inspirations, and their audacious endeavors to push against the boundaries of traditional art. Each artist brings a unique perspective, style, and story into the mix, enriching the film's narrative and providing it with a captivating diversity.

Van Arno's contributions are particularly stark. Hailing from the Juxtapoz school of painting, Arno’s work is marked by its exceptional figurative know-how, with iconic imagery and a modish, pop culture relevance that genuinely stand out. A further delve into his world presents an exploration, not just of his art but also of his life, as we begin to understand the experiences that have informed his unique artistic voice.

The vibrant wilderness and pop surrealism of Anthony Ausgang are another highlight of the documentary. Known for his distinct, visually striking works that often depict cartoon-like creatures in wildly surreal scenarios, Ausgang's art draws from a deep well of influences, ranging from psychedelic experiences to car culture, providing viewers with an immersive and culturally robust viewing experience.

On the other hand, Glenn Barr, a Detroit-based artist, presents yet another shade of the underground artistic panorama. His art delves deeper into dystopian themes and evocative narratives, reflecting social realities through an innovative visual language, enhanced by his expertise in comics. His contribution to the film significantly enriches its substance, charging it with a deeper, thoughtful vein.

New Brow operates brilliantly on two levels: it immensely celebrates the artistic endeavors of these acclaimed figures while also serving as a conducive platform for discussion and dissection of the New Brow art movement as a whole. This dual operation creates an engaging dynamism throughout the film, bounding it with a whirlwind of aesthetics, narratives, and insightful commentary, which ensures a fulfilling and thought-provoking viewer experience.

Tanem Davidson steers the film masterfully, introducing viewers to this vibrant subculture of art, its key players, their works, and the socio-cultural contexts within which they operate. He takes on an immersive narrative style, utilizing interviews, studio visits, and showcases of numerous artworks to paint a comprehensive picture of the underground art scene. The result is an intimate connection between the viewers and artists, conveying the passion, rawness, and audacity that mark this unique realm of creativity.

Moreover, New Brow serves as a historical document of sorts, demonstrating the growth of the underground art movement from a niche, subversive arena to a gradually more accepted and appreciated part of the broader artistic community. With its focus on the 21st-century art landscape, it encapsulates the dynamic shift in perception towards these different forms of self-expression, thereby making a strong case for their recognition and appreciation.

In closing, New Brow: Contemporary Underground Art is much more than a film. It's an art piece in itself, celebrating the rebellious spirit of underground artists and the breathtakingly beautiful chaos that their works encapsulate. Whether you're an art enthusiast or a docu-film lover, this 2009 gem is bound to engage, inspire, and provoke thought, offering an unmasked view into a world that thrives in artistic expression and creativity outside conventional norms and aesthetic considerations.