How to do creative brainstorming for promo videos

I got a job in to make a short 15 second promo video for a local boutique style gym. Followed up next by some longer videos.

Just wondering what others methods to do this are?

The method I used was;

Key points of USPs;

Welcoming, friendly, community feel.

Hybrid workouts, personalization, custom, tailored goals.

capped classes.


Problem

Gyms are non personal, get lost in crowd, not clear instructions, intimidating


Solution

Small, personal, welcoming, friendly, custom, tailored goals.


After watching this video, I want someone to feel;

Motivated and supported, interested


Ways to demonstrate:

Motivated: Community atmosphere,

Supported: caring attentive personal staff.


Benefit of Benefits:

Energized & focused
Fit & active
Fun & beaming
Desirable


Brainstorming;

Highlight benefit of benefits through text.
Show Motivated and Supportive through visuals.

Reduce amount of exercising shown.
Show people, talking, laughing, smiling, having fun, looking good, friendly.

Script
Will use those elements from brainstorming, have written it out but I cant see how to post in a table.