from pydantic import BaseModel
from typing import List
from typing import List, Literal

class CaptionSegment(BaseModel):
    start: float
    end: float
    text: str


class VideoMetadata(BaseModel):
    id: str
    title: str
    channel: str
    duration: int
    url: str


class TranscriptResponse(BaseModel):
    video: VideoMetadata
    captions: List[CaptionSegment]
    language: str
    source: Literal["human", "auto"]