You def want to mix in audio, titles and images if you don't have any video. If you are going to be producing more of these videos in a similar fashion, it would be wise to try and templatize your video project. For instance, you can keep a common intro and outdo and use this as a "donut/bookends" as we call it in the TV industry. You can always find good after effects templates for lower thirds on video hive or cgi peers.
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