This episode outlines the fundamentals of data compression, explaining its necessity due to the large file sizes of modern media like HD video, which would otherwise be impossible to stream. It differentiates between lossy and lossless compression, with examples for each type. The text further details lossy compression artifacts like noise and blocks, and describes lossless techniques such as run-length encoding for images and dictionary compression for text. Finally, the source emphasizes the benefits of compression in reducing download times, saving storage space, and enabling efficient data streaming, along with an explanation of buffering.

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