What does "the lot" mean?
This sentence may seem a bit confusing. Ellen is talking about how BTS are fans of the show "Friends." When she says "they shot here on the lot," she means to say that the show "Friends" was actually filmed in the same location as Ellen's own show. Thus, we can understand this latter part of this sentence as meaning, "Friends was also shot (filmed) at the same lot (location as my show)." Ex: A lot of famous movies and shows were filmed at the same lot in Los Angeles. Ex: This lot (piece of land) will be used to create a film set.