Often dubbed as the “greatest film ever made,” Orson Welles' magnum opus "Citizen Kane" is not merely a movie; it's a study in groundbreaking filmmaking. Released in 1941, it presented a non-linear narrative, pioneering cinematography, and a complex portrayal of its titular character, Charles Foster Kane. Its adaptation to buy old classic movies online has been nothing short of a gift for cinephiles, allowing for a deeper understanding and appreciation of the film's numerous layers.

One of the standout qualities of "Citizen Kane" is its cinematography. Greg Toland's deep-focus technique, where both the foreground and background remain in sharp focus, was revolutionary. On DVD, this method is highlighted in all its glory. Scenes, such as the young Kane playing in the snow visible through a window in the background while his parents decide his future in the foreground, gain prominence, underscoring the storytelling prowess of visual techniques.

However, where the DVD truly shines is in its additional features. Insights into the controversial aspects of the film, especially its parallels with the life of media mogul William Randolph Hearst, make for a riveting watch. Hearst's alleged campaign against the film's release and his displeasure at what he deemed a personal attack add layers of intrigue to the cinematic experience.

Moreover, commentaries accompanying the film often dissect each scene, providing viewers with a deep dive into Welles' vision. Film scholars and historians elaborate on the significance of certain sequences, the innovations in sound editing, and the layered meanings within the narrative. For example, the mystery of "Rosebud," a pivotal element in the movie, is explored in depth, making viewers ponder on the themes of loss, memory, and the human desire for simplicity amid complexity.

The making of "Citizen Kane" is as captivating as the film itself. Behind-the-scenes footages available on the DVD detail the challenges faced during production, the innovative set designs, and the complexities of shooting some of the film’s iconic scenes. Interviews with surviving cast and crew members, if available, weave tales of a young Orson Welles, then only 25, taking Hollywood by storm with his audacious vision.

Furthermore, the DVD often includes retrospectives on Orson Welles' career. From his early days in theater to his radio ventures, especially the infamous "War of the Worlds" broadcast, these features paint a comprehensive picture of a genius who continually pushed boundaries.

An essential aspect of "Citizen Kane" on DVD is its meticulously restored quality. Ensuring that the film remains true to its original form, while enhancing its audio and visual clarity, is a testament to the respect and reverence accorded to this masterpiece. Grainy sequences have been polished, audio hiccups smoothened, and in some cases, original storyboards and concept art have been included for a comparative analysis.

In conclusion, "Citizen Kane," while a marvel in its own right, becomes an immersive experience on DVD. It's not just about revisiting a classic; it's about understanding the essence of innovative filmmaking, appreciating the audacity of a young director's vision, and witnessing the legacy of a film that redefined the parameters of cinema. The DVD ensures that Welles' masterpiece remains not just a relic of the past but a living testament to the boundless possibilities of storytelling.