No, it wasn't from the first episode...the mooching aspect of Kramer was developed later on. My question is though, "When was that scene filmed?" Jerry appears somewhat younger...but not 11 years younger. My guess is that they shot it at some point when the apartment set was clear (such as the beginning of a season, or when it was rebuilt after a fire a few years back) and held it for some unknown future use.
Bob Gassel