They didn't vanish, only to return years later on some "Remember the '90s" clip show.
It is a clip show looking back at the week's television.
Overdubbed is a clip show with the sound track altered.
These three aspects support the idea of this episode being a clip show to the extreme.
Episode 14 is a clip show with never before seen footage.
Backstory from the first clip show is never told.
Dweeb also made three appearances in the main series, one a clip show from the last two seasons.
"The Banker" is the first clip show of the series.
Why does The Office need a clip show now?
So far the round has only featured as an out-take during clip shows.