使用Kudan AR Unity插件w/纸板SDK不能在iOS应用上渲染视频纹理吗

I'm trying to replace my own SLAM code with Kudan Unity Plugin (1.2.1, native 1.2). I've already succeeded in building and running sample app on my iPhone. I also checked the plugin works on my Unity project on the editor. But when I build it on my iPhone, it does not render the video background as like in the I'm trying to replace my own SLAM code with Kud