Subtitle Prompts
Subtitles have their own prompt list, with a video summary in place of the page content variables.
Open Options → Video Subtitles → Custom subtitle prompts → Manage prompts.
This list is separate from the page-translation one, and nothing crosses between them: selecting a prompt here does not change what a web page is translated with, and the page's prompt list cannot be used for subtitles. Everything else about the editor — the two fields, the copy-a-built-in workflow, import and export — works exactly as it does in Custom Prompts.
What is different
Subtitles ship one built-in prompt, and they take a different set of variables.
| Variable | Subtitle prompts | Page prompts |
|---|---|---|
{{targetLanguage}} | Yes | Yes |
{{input}} | Yes | Yes |
{{webTitle}} | Yes | Yes |
{{webDescription}} | Yes | Yes |
{{videoSummary}} | Yes | — |
{{webContent}} | — | Yes |
{{webSummary}} | — | Yes |
{{videoSummary}} stands where the two page variables would be: a video has no article body to quote, so the context a subtitle request carries is a summary of the video itself. Filling it requires AI Smart Context; without that, the variable is replaced with No summary available.
{{input}} here is caption lines rather than paragraphs, and a batch of them is separated the same way a batch of paragraphs is.
A variable from the other column is not an error — it is simply not substituted, and the literal {{webContent}} is sent to the model. The buttons under each field only offer the ones this list can fill.
For the sample value each variable is replaced with, see Prompt Variables.
One rule that is not appended
When a page-translation request carries several paragraphs, Read Frog appends an extra instruction telling the model how to mark a paragraph that already reads as the target language. Subtitles get the multi-item rules but not that one.
So a subtitle prompt never has to account for the sentinel marker, and a caption already in your target language is translated rather than flagged. The full ordering — which rule blocks are appended when, and what happens to the reply — is in How a Request Is Assembled.
Subtitles are read at the pace of the video, so brevity matters more here than in an article. A subtitle prompt that asks for short, spoken-sounding lines is usually worth more than one asking for a polished rewrite.