VOD and live streaming serve different viewer behaviors, but your caption strategy impacts both. StreamTranslate's live captions automatically carry over to VODs and clips — no extra work needed.
Add Live Captions FreeVideo on Demand (VOD) is pre-recorded video content that viewers can access and watch at any time they choose. Examples include YouTube videos, Netflix shows, Twitch past broadcasts, and any content uploaded to a platform for asynchronous viewing. The defining characteristic of VOD is viewer control — they choose when to watch, can pause, rewind, and fast-forward.
Live streaming is real-time broadcast content that viewers watch as it happens. The content is created and consumed simultaneously, which creates the unique social experience of thousands of people sharing a moment together. Live streams on Twitch, YouTube Live, Kick, and similar platforms typically have live chat, which becomes a community space synchronized around the same moment in the broadcast.
For streamers, most platforms offer both: you can stream live and have that content saved as a VOD for viewers who missed it. Twitch saves Past Broadcasts for 14 days (non-affiliates) or 60 days (affiliates and partners). YouTube auto-archives live streams as videos. Kick also preserves VODs. This means your live stream content has a long tail of discoverability through VOD platforms.
Captioning approaches differ significantly between live and VOD content. For VODs, you have the luxury of time — you can use batch transcription tools that process the full audio file with higher accuracy, generate SRT caption files, and upload them as synchronized subtitle tracks. This produces very clean captions but requires post-production work after each stream.
Live stream captioning requires real-time streaming ASR — transcription that happens simultaneously with the audio, producing captions within hundreds of milliseconds of speech. StreamTranslate uses Deepgram Nova-2 for this, achieving accuracy comparable to batch transcription while meeting the latency requirements of live captioning.
The best news for StreamTranslate users: because captions are rendered as a visual overlay baked into your stream video, they automatically carry over to VODs, clips, and any recording of your stream. When a viewer watches your Twitch Past Broadcast or a clip someone made of your stream, the StreamTranslate captions are visible in the video without any additional work. This gives you both live captioning and permanent VOD captions in a single setup.
StreamTranslate captions bake into your stream video, appearing automatically in Twitch VODs, YouTube archives, clips, and any recording of your content.
Live captioning uses streaming ASR; VOD captioning uses batch transcription. StreamTranslate's streaming ASR achieves comparable accuracy in real time.
Captioned VODs rank better in search, get more views from non-native speakers, and are accessible to hearing-impaired viewers — extending the value of your live content.
VOD (Video on Demand) is pre-recorded video that viewers can watch at any time, as opposed to live streams broadcast in real time.
Yes. Twitch saves Past Broadcasts for 14 days for non-affiliates and 60 days for affiliates and partners.
Yes. Because StreamTranslate captions are baked into the stream as an overlay, they appear permanently in VODs, clips, and any recording of your stream.
VOD captioning can use slower but more accurate batch transcription. Live captioning requires real-time streaming ASR like Deepgram Nova-2 used by StreamTranslate.
Use batch transcription services to generate SRT files, then upload as subtitle tracks on YouTube or embed in video files using editing software.