Hi,
I have able to create this app for using ROAR, BLIPPER, PLATTER platform.I give you perfect work as per your requirement like scanning the marker and show video in AR.
I have deep knowledge and practice in such technologies as Unity, Unity 3D modeling, OpenCV, ARToolKit, Google Cardboard, ARKIT, Xcode, Objective-c, OpenGL and set of other technologies needed to build AR and VR applications.
-Yes, I can certainly help you to create a customized Application as per your requirement. I can make 100% responsive and perfect Application for you.
I would able to create this app with given timeline and high quality.
I look forward to your valuable feedback.
Thanks