What concern does the man mention? [br] [originaltext]W: Hi, Frank. Is there a

W: Hi, Frank. Is there a training video I can help you find on that shelf?
M: No, I just noticed that some of these training lectures are still kept on videotape. You know, over time, their sound and picture quality will get worse. That could be a problem. Shouldn’t we upgrade them to DVDs or another computer-based format?
W: Actually, they were converted to DVDs last month. We’re keeping the original tapes just as backups. Every training DVD is now in the research room. I’ll be glad to show you the exact place they’re stored.
M: Oh, I don’t need any of them now, thanks. When I need one, I’ll talk to Rose, the research room clerk. In fact, I’m going to write down her extension number right away before I forget.