I think Bernie talked about why at some point? Like they lost the original high def files, and had to edit those episodes together again.
Okay so I’ve had several people reply to that post, with variations on this answer, and I appreciate this information—which sounds vaguely familiar, so I think I had read it before.
However, these are answers to a different question than the one I had intended to ask. I’m not talking about minorly different edits. In some cases, I’m talking about sequences of several lines they chose to edit out originally for comic effect (e.g., leaving in all of Ricky’s uncomfortable “um”s but not the words in between them), but left in for the DVDs. Watch both versions of Episode 37—starting from when Lydia is costume theatre-ing Jane—and you will see what I am talking about.
I mean, perhaps they could not take the time to re-edit the episode with all those jump cuts, but I had the feeling that this was a conscious choice to show more of Ricky Collins’ discomfort. (I found it sort of funny, but mostly too cringey; I preferred the original YouTube edit.)
Also, and I don’t have time to check this right now, there’s a smaller difference in the episode that ends with Lizzie taking a sip of the tea that Mr. Collins brings her, and then spitting it out. I’m pretty sure that her spitting it out was the end of the YouTube video, but on the DVD she says something afterwards.
From all of this I conclude that Charlotte was a good editor.