Add caption renderer

[timmydoza]

Contributing to Twilio

All third party contributors acknowledge that any contributions they provide will be made under the same open source license that the open source project is provided under.

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Pull Request Details

JIRA link(s):

• VIDEO-9277

Description

This PR adds a CaptionsRenderer to the video app. This can be enabled by clicking on the Show Captions button in the More menu:

With this enabled, captions will be rendered on the screen.

Burndown

Before review

• [ ] Updated CHANGELOG.md if necessary
• [ ] Added unit tests if necessary
• [ ] Updated affected documentation
• [ ] Verified locally with npm test
• [ ] Manually sanity tested running locally
• [ ] Included screenshot as PR comment (if needed)
• [ ] Ready for review

Before merge

• [ ] Got one or more +1s
• [ ] Re-tested if necessary

[Geczy]

can this get merged?

[lovedota]

I tried this code, but it doesn't work ? Do we need a new api key for transcription ?