That's a bad test. It mainly just filters out shows filmed in front of a live audience.
If you film a comedy in front of a live audience, the actors have to adjust their delivery to speak around the laughter. If you take the laughter out of the final cut the pauses were the actors were waiting for the laughter to die down make it weird and awkward.
If a scene only needs one or two takes to get right, they can just go with the laughter from the live audience. If it takes several takes, they will still be getting laughter from the live audience, and so changing the timing of the delivery, but it won't be as intense as it should be for the quality of the joke, and if that live laughter was used it could change the perception of the joke for the broadcast audience. (Our perception of a joke is influenced by how we think others perceive it).
Hence, if you use a late take you need to replace the late take live laughter with either earlier take live laughter or laughter from a laugh library.
If you film a comedy in front of a live audience, the actors have to adjust their delivery to speak around the laughter. If you take the laughter out of the final cut the pauses were the actors were waiting for the laughter to die down make it weird and awkward.
If a scene only needs one or two takes to get right, they can just go with the laughter from the live audience. If it takes several takes, they will still be getting laughter from the live audience, and so changing the timing of the delivery, but it won't be as intense as it should be for the quality of the joke, and if that live laughter was used it could change the perception of the joke for the broadcast audience. (Our perception of a joke is influenced by how we think others perceive it).
Hence, if you use a late take you need to replace the late take live laughter with either earlier take live laughter or laughter from a laugh library.