90 sec animation - urgent

I need, for my client, a 90 sec explainer video.
I will provide voice over but would need you to start now if you can.
We can start with rough storyboard and then go to animation.

Tone of voice:
- more educational than 'professional sales presentation'
- female probably
- not too 'fun' ... this is serious science tackling the most serious problems ... BUT, we still want to make this 'accessible' ... so we aren't dumming it down or making light of the science ... but we are recognising that not everyone is research chemist

Timing is tight.
I need a storyboard ASAP and a draft animation by Monday next week.

Client's website: https://n2applied.com
I imagine you (partly) work with imagery from stock websites.
How do you deal with image rights? I just want to make sure my client is covered.


Videos I saw I believe the client will like:
https://www.youtube.com/watch?v=O4m_w--Q1H8
https://www.youtube.com/watch?v=VL4usqwdEQw
https://www.youtube.com/watch?v=NMXjNAfT94M&list=PLpatFT5Depb6OT6cRJ-ImYq6_xkYE5mpJ
https://vimeo.com/187066055
https://www.youtube.com/watch?v=XP5rHi56N54&t=42s