Hello Ted Lee,
Please let me know the video application that you are using is UVC or Non UVC
If it is UVC application, you can use video host application such as VLC, AmCap, eCam View
If it non UVC application, you can use streamer application (in FX3 SDK Path: ..\Cypress\EZ-USB FX3 SDK\1.3\application\c_sharp\streamer\bin\Release) to view he data coming from FX3 and to view the video you need to develop your custom host application
Please let me know if any queries on this
Thanks for your help.