License Question: Number of End Products

I recently purchased a Logo Reveal from VideoHive for YouTube videos.

As I was just about to purchase a song from AudioJungle for the Logo Reveal, I noticed in the license of the Audio it states “Use in a single end product”. Then went back to check the Video and it stated the same.

I was under the impression that I could purchase both a video and audio and use the video/audio combination for my logo reveal in all of my YouTube videos and the license would cover it?

I also want the audio to play over the logo reveal for 3 seconds then as the logo reveal video fades out, I want the audio to play for another 5 seconds or so while I intro the video instead of abruptly stopping. Is that then considered a “new product” or the same thing?

I need a bit of clarification, thanks!