By default Replay Media Catcher is set with an initial buffer time of just over 8 seconds - 8192 milliseconds. When the duration of a stream is known and this is less than 60 minutes and enable super download is selected in Settings, the buffer time is set to the duration of the stream and the stream will download all at once and fast.
In the case of these site, no duration is transmitted and so the default buffer is not adjusted.
At any time you can up the default buffer size. Here's how:
- Select Tools > Settings and expand RTMP Download Tweaks
- Changing the Initial Client Buffer Size setting to something like 3590000 will download just under 60 mins worth in one hit.