How do I set a mp4 as my background? Ok so i got this template from the internet, and it came with an mp4 file called shockwave, everything worked, but I dont know how to add that shockwave behind the text. here is how it suppose to look.
https://www.youtube.com/watch?v=X8WKpitwn4Q 


Time where it shows it: 0:13 - 0:14


and right now i got the text and the audio working. I just need the shockwave to show on the background.
If someone can help, i would appreciate it a lot!!!
Thanks!
You can combine a 3D Scene with a video using different tools:

Node Editor (Compositing) 

PRO: Here you can apply filters, color correction, and other cool effects.

CONS: Non-linear editing is a little complicate

Some tips:


Set alpha mode Transparent in the Render Panel
Toggle Compositing in the Render Panel
Scale the Movie Clip to fit the render dimensions




VSE (Video Sequence Editor) 

PRO: Easy control over the timeline

CONS: Little effects

Some tips:


Select the Scene Strip and set Blend to Alpha Over
Toggle Sequencer in the Render Panel




This is only an overview: you'll find a lot of tutorial on the web about Node Compositing and VSE (Video Sequence Editor)