1. Enhance the focal point

Consider enlarging the image of the man in the sailor's uniform to make him the central focus of the thumbnail, drawing more attention to the subject of the video.

2. Add relevant text overlay

Include text overlay on the thumbnail such as 'Captain of Luxury Yacht' or 'Sailor Life' to provide context and intrigue for viewers.

3. Incorporate branding elements

Integrate elements like a small logo or branding symbol related to sailing or yachting to reinforce the theme of the video and create brand recognition.

4. Utilize vibrant colors

Enhance the colors of the yacht and sailor's uniform to make the thumbnail more visually appealing and eye-catching, potentially increasing click-through rates.

5. Create a sense of movement

Consider adding effects like waves crashing against the shore or seagulls flying in the background to create a dynamic and engaging thumbnail that indicates action.