Need a 4-minute explainer video for our clients

Hi there! We're a small accounting firm and need a 4-minute explainer video for our clients. This will probably be the first of quite a few, so there could be ongoing work if we're happy with the outcome.

We'd like the video to be quite simple - in this sort of style: https://www.youtube.com/watch?v=ThiCMd5kGbE

We'll provide the script, and need some royalty-free music and graphics, with simple animations to keep our clients' attention and help explain the subject material.

Please send your proposal for the full fee, along with links to some of your previous explainer/animation videos - thank you!