There are more of them on this channel.
I remember back like 1-1.5 years ago I heard an audiojungle music at pewdiepie. But I know it was from audiojungle because he used the preview file in the video with the watermark on it LOL
I also heard that.
It would be interesting what the audiojungle author of these tracks should do if their watermarked item is used
You can report this to the Support Staff by filling out a very short form, and providing the link to the video. They will look into it and you could possibly receive a Copyright Ninja badge for your efforts. Give it a try.