apify-video-transcripts 是做什么的？
Turn video and audio into text — full transcripts, timestamped segments, SRT and VTT subtitles, and the first-3-seconds hook — from one YouTube video, Short or live VOD, a whole YouTube channel in a single run, a creator's Instagram reels, a podcast episode, a Loom or a Twitch VOD, or any direct media file link. Captions are used where they exist and speech-to-text runs where they do not, in ~90 languages, with no third-party API key and no charge when a video has nothing to say. Use when the us