The term "WebDL" is a bit tricky. It's a way of distributing movies or shows via the web, usually with high quality. But if the show was released in 2020 but the WebDL version came in 2021, maybe it's a later release in a different region or platform. However, considering that the original MTV Mastram was in the 2000s, perhaps this is a newer series with a similar name. Alternatively, maybe there's a 2021 release that's being referred to here.