Just doing some testing with MP4 video vs FLV as the MP4 seems to produce a lot better quality for the same bandwidth.
From what I can tell though it seems that MP4s do not "stream" from an http server like FLVs do when using the Articulate player. I haven't poked into it too much but it feels like the whole MP4 downloads before the video starts playing. Is my impression correct? Do FLVs "stream" with the articulate player but MP4s do not?