Best Interval Rate vs Video Bitrate

[74rku5]

Admittedly, I"m just playing with it, but I didn't change the refresh from the default 5 seconds, and when I tested it, I had created 55 5-second videos. So I increased the capture_interval to 300, and tested again, and nothing saved.

Rather than trying over and over again, does anyone know the most appropriate rate for high VIDEO_BITRATE, and then for medium, and for low?

Thanks