Educational YouTube Thumbnail Design

I'm looking for a talented designer to create professional and academic-style thumbnails for my educational YouTube videos.

Requirements:
- Modern and clean design
- Bright and colorful elements
- Professional and academic tone
- Serious and formal design tone

Key Elements:
- Must include text with the video title

Ideal Skills and Experience:
- Experience in creating YouTube thumbnails
- Strong graphic design skills
- Ability to convey complex ideas visually
- Proficiency in design software (e.g., Photoshop, Illustrator)

Please provide a portfolio showcasing similar work.