How does this work?
For whatever reason, Netflix uses its own player, called JPlayer, if it detects that it is running on Android 4.2. For whatever reason, JPlayer does NOT like the current video subsystem in CM10.1 on Exynos4 devices.
What this module does is make Netflix always think that it is running on ICS, which will make it use what appears to be the system OMX player. (I'm not entirely sure of this, but I am sure that it is NOT JPlayer and it DOES work on all of my devices I've tested).
This is an interim workaround/hack until the root cause of JPlayer failing on Exynos4 devices can be determined. (Edit: From talking with a few people, JPlayer is replacing a number of components of Android's playback framework. This includes components that have been altered for Exynos4 compatibility.)
DO NOT REPORT THIS ISSUE IN CYANOGENMOD JIRA. No affected devices are receiving M or stable builds and this is one of the many reasons.