Tracks offered though MultiTracks.com track products are not permitted for use in personal or promotional video content per the MultiTracks.com terms of use.
Using any artist original audio content in personal or promotional video content requires a sync license which is not currently offered through MultiTracks.com.
How to obtain sync licenses?
In order to use an artist's original tracks in your personal or promotional video content, all permissions and licenses would need to be obtained from the license holders (The original artist, publisher, label, etc.).