My first zombie couple render had bloody tears

In early October a clip format took off on TikTok. One person turns into a zombie, the other raises a gun, can't fire, lowers it, and they hug. Under those videos people kept asking what app made it.

I'm a programmer from China and new to SEO. I built zombie-couple.com for that one scene. You upload two photos, the one who turns and the one holding the gun, and it renders a 10-second clip.

A few things from building it:

• The model is Seedance 2.0, called through a third-party API. My test renders took 274 and 388 seconds, so the page lets you leave and come back.
• My first test render gave the zombie bloody tears. Adding "no bloody tears" to the prompt fixed it.
• There is no free render, because every render costs real GPU money. One evening of test renders cost me about $10.80 in API credits.
• If a render fails, the credits go back automatically. Uploaded photos are deleted after 14 days.
• The prompts behind the sample clips are free on the prompt page, if you'd rather paste them into your own video tool.

Google indexed the homepage within a day. Real sales so far: zero.