as far as i know the spec doesn't specify a maximum size for an object or for the entire cache, but e.g. firefox has a preference which by default allows a total of 50mb worth of cache-files. that implies that indeed the cache is optimized for small files (html, css, js, images) and not for big files (video, audio, ...).
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…