When it comes to audio and video files - some companies reserve the right to make these files available freely and thus have to be purchased to gain the right of using these types of files. This is the main reason why you will find that we have not been unable to make any preset Video FX templates available with backgrounds and audio files.
But the great thing is that you still have preset templates that you can simply add your own background and audio files to - and of course for more extensive experiences you can go the extra mile and create your own templates: Click here for the article on the Video FX template builder.
With that said, we have found some great resources that will help you source some really awesome (Royalty-free) backgrounds and/or audio files:
Audio sources: (Each of the listed sources are hyperlinked - just click on them to access the site)
Video Sources: (Each of the listed sources are hyperlinked - just click on them to access the site)
Please do feel free to reach out to a support representative if you do not manage and if you have any questions and/or concerns!