How it works
What goes in and what comes out
You paste the post you are answering and, if you like, the point you want to make. An AI model (Llama 3.1 8B, run on Cloudflare Workers AI) writes four different YouTube comments in the tone, length and language (English or Vietnamese) you choose. Each draft has its own copy button, and "Write new drafts" asks again with the same brief.
The prompt describes how people write on YouTube: Refer to something specific in the video. Friendly, can be playful. Timestamps like 2:15 only if the brief gives them. No hashtags.
Length
YouTube allows up to 10,000 characters in a comment (as of 2026). Each draft shows its count against that limit and is marked if it runs over, so you can trim it.
Short, Medium and Long aim for about 40–120, 120–250 and 250–500 characters, within any limit.
