This is the most straightforward part: users are searching for a — i.e., an activation code they can use without paying. This is a common search pattern for commercial software that users no longer wish to purchase or have lost the original key for.
To help you get your video hardware working, please let me know: What are you currently using? What is the brand or model of your USB capture device? Are you trying to digitize VHS tapes or watch live TV ? This is the most straightforward part: users are