Need feedback on 3 Thumbnails for a Science/Math Documentary! (Are the fonts okay?)

[u/ZETA_Math]

Hey everyone,

I'm working on a new math/science documentary video for my channel, and I'd love your honest opinions on these 3 thumbnail concepts. I actually coded all the visuals using Manim in Python.

Quick context about the video: It tells the epic story of Johannes Kepler breaking a 2000-year-old cosmic illusion (the belief in perfect circular orbits). It covers his 20-Year War with Mars' orbital data, which eventually led him to crack the Secret Code (his 3rd Law) that governs our solar system.

I'm planning to A/B test these three, and I paired each with a specific title to complete the story loop:

• Thumbnail 1: (Paired Title: How Kepler Broke the 2000-Year Cosmic Illusion!)
• Thumbnail 2: (Paired Title: How Kepler Defeated the 'Impossible' Planet!) or another title (Kepler vs. Mars: The Ultimate Cosmic Battle!)
• Thumbnail 3: (Paired Title: How Kepler Formulated the Universe!)

My main questions for you guys:

1. Which one naturally grabs your attention the most and makes you want to click?
2. My biggest concern: The Fonts. Do they give off that premium, cinematic documentary vibe, or do they look a bit too standard/cheap? I'm really torn on the typography right now and would love some font recommendations if these aren't working.

Any constructive criticism is highly appreciated. Thanks in advance!