Audojungle license for YouTube intro with fading in/out

Hey folks! I want to use music from Audiojungle for my YouTube intro and outro. There are various threads in this forum confirming that a standard license is sufficient as long as the intro remains unmodified, for in this case the intro itself rather than each video would be considered the end product.

One nuance that I haven’t seen addressed is that ideally I would like to fade the intro in and out. Naturally, the video before and after the intro will be different each time so technically the music will play over different content.

Would this still be covered by a single license given that the intro itself remains unmodified? If yes, how long can I fade it in exactly? What are the rules for this and where can I find them?