Looking for some help with basics of RFID tag recognition

Hi there,

 Inexperienced user here.  I am looking to build a project that I just don't know where to start.  I've had some fun with simple visual programming in Touch Designer but haven't dabble enough with DAT's to get this started.  

 What I want to achieve is video playback triggered by an RFID tag(s) being recognized.  I have a reader that supports Keyboard emulation and keyboard wedge.  I could get a reader that supports USB serial if thats a better route to go.  

 I guess what I'm looking for is a solution to get a simple on/off value received each time an RFID tag is read.   I want to send this out to trigger the rest of the network to switch between or playback video's.   The video playback and switching I can handle.

 Please let me know if there are some good learning resources for this kind of programming.   Touch Designer has been fantastic, but sometimes I'm not the best at finding learning tools that work for me.