Yes, it does. I managed to capture a 40 megs flv from AtomFilms without a hitch.
I also tested
FLV Recorder (FLV-R). The way it captures the clips is different from
Replay Media Catcher (RMC) and I think is good to let you know. RMC opens a second, browser independent, stream to capture the data while FLV-R seems to use the same stream you use to watch the clip.
What does that mean? Well, in the case of AtomFilms, as the embedded web player doesn't cache the data, FLV-R is subject to problems with bandwidth fluctuation. If you pause the movie or your bandwidth usage blocks the stream, it keeps recording the paused frame until you resume viewing or the traffic conditions get better. At the end of the capture it does some post-processing and removes unwanted pauses and synchronizes the audio, so you get a faithful copy, while RMC gets an exact copy or aborts, in which case you have to restart until you get your exact copy.
In most cases, and if bandwidth is not an issue, both programs will capture the same. If you connect to Internet with a "traditional" 56K modem however, I suggest you favour RMC over FLV-R. In my case, I use a wifi connection, but my AP is so far away from my computer that my signal is weak and conditions are somewhat similar to a modem, so I found out this difference in behaviour.
Both programs capture the stream url without problems, contrary to
URL Snooper, that I couldn't manage it to parse correctly the url. With the added keywords, URL-S detects the url, but cuts it wrongly and gets strange characters in it. Once more, this may be due to my connection circumstances and you might find out URL-S is working for you. Also, future versions may address this problem and solve it.