YouTube's ContentID algorithms are solely responsible for finding and matching the sound recordings we deliver to them to videos in their platform. Catapult can make no guarantee that YouTube's ContentID system will match every single video in YouTube that may (or may not) be using your authorized sound Recording as Catapult has no control over this mechanism and cannot force a video to be claimed even if a user believes it is using their sound recording.
We realize this can be frustrating at times (And it's frustrating to us!), however, there are number of reasons that YouTube's ContentID system may not find a match for a given sound recording on a given video and a list of the most common reasons are below*:
1) The sound recording you authorized for monetization does not exactly match the sound recording in the video. This could be due to it being a different version entirely (ie: Remastered, remixed, etc.) or could be due the sound quality of each of the reference sound files being different enough to inadvertently obfuscate a legitimate match.
2) The volume of the sound recording in the video is too low in comparison to other ambient sounds in the video, which prevents YouTube's algorithm from matching it.
3) The sound recording in the video contains non-exclusive sound effects, sound libraries, loops from 3rd parties that have blocked the ability to monetize the video.
4) The video itself contains other content that is being claimed and blocked for use by other parties. This could include other songs that are performed in the video, the rights to any compositions in the video, or the rights to the video itself.
5) The video has been claimed for monetization by the channel owner where the video is being served from.
6) The video contains video gameplay footage (by other than the game’s publisher).
7) The sound recordings in a video must be sufficiently distinct. Karaoke recordings, remasters, sound-alike recordings, sound effects, soundbeds, "royalty free" production music libraries (typically licensed for use in game, film, TV or other soundtracks) or production loops may prevent your authorized sound recordings from matching a video.
*This is not an exhaustive list and in the end, we can only state reasons that YouTube states publicly. Once again, YouTube's ContentID algorithms are solely responsible for matching sound recordings to videos in YouTube.