The primary reason Party Down achieved cult status is its ensemble cast. At the time of airing, they were largely "that guy/that girl" actors, but looking back, it is a murderers' row of comedic talent.
No known release uses h255 . If you’ve seen that in a filename, it’s likely: party down s01 h255
If you can clarify what h255 refers to (a tracker name, a hash, a personal rip label), I can offer a more precise technical match. Otherwise, enjoy Season 1 via any good 1080p WEB-DL or Blu-ray encode. The primary reason Party Down achieved cult status