This 90s tribute to Leonard Rossiter is fairly well made, and features extracts from Rising Damp and Reggie Perrin, in addition to Le Petomane and some (tantalisingly brief) clips from Tripper's Day (Rossiter's final sitcom) and The Losers, a 1978 sitcom with a young Alfred Molina. Plus, it has to be said, rather more of the Cinzano ads than you might want.
As has been pointed out, however, it's fairly short: it only runs to 52 minutes, so might have been better as an extra on a Rising Damp or Reggie box set. But provided you can accept that, and the fact that the programme does not consist exclusively of clips, it's an enjoyable and occasionally illuminating piece. The numerous short clips from Rising Damp are well chosen, and there is some attempt at analysis of Rossiter's performances.
Eric Chappell and Don Warrington make the most effective contributions, although we also hear from some of the Reggie Perrin actors. If this is available cheaply, and you are a Rossiter fan, I'd say it may be worth getting.
I suspect, however, for some it may fall between two stools: neither wall to wall clips for those in search of undiltuted laughs nor, despite occasional insights, the more incisive analysis to be found in John Fisher's Heroes of Comedy programme on Rossiter (which has a wider range of talking heads). At the time of writing, however, Fisher's programme is not available on DVD so this may have to do - although you would be advised to scan the More 4 schedules as the Heroes of Comedy series appears to be repeated on a loop.