Crowdfunding Video Production

I need a 1~2 minute video for promoting a social cause crowdfunding project. The video will be a montage of images and clips with a voiceover. I can provide the context, but I need help sourcing the materials.

Ideal Freelancer:
- Experienced in video generation
- Capable of creating a compelling, emotional video
- Able to source relevant images and video clips
- Understanding of the social cause context
- Excellent scriptwriting and voiceover skills

Please provide examples of your previous similar work.