That's not the only thing NG makes an issue out of, that has very little to do with the case, IMO. Talking about what Casey does in jail every day... "lounging, reading, napping,..." What else can she do? And then there's the list of things she orders from the commisary... it's my guess that being locked in a cell and having to subsist on jailhouse food would make one bored and hungry... so she buys snacks she can nibble on, which breaks the monotony. Doesn't prove anything, and in fact... it has no bearing on this case! Just Nancy's little subtle nitpicking in order to taint a jury pool!
And actually.... I did see some tears in some of these videos... not sure what she was crying about, but she did cry and she did mention Caylee a few times. As for LP offering to put up her bail.... might that just be a subtle message to Casey? "Tell the truth and help us find Caylee's body, and I'll get you out of jail again."