This specific collection of Dragon Ball Z episodes (1-276) typically refers to the original Funimation English dub run that aired on Cartoon Network's Toonami. While the uncut Japanese series consists of 291 episodes, this 276-episode version is a staple for fans who grew up with the Bruce Faulconer score and the specific "edited-for-TV" pacing. Series Overview
Here is that article.
The RMVB (RealMedia Variable Bitrate) extension was the "gold standard" for anime pirates and collectors before high-speed fiber internet was common. Dragonball Z All Episodes 1-276-RM-RMVB-apoorv1...