By default, Amazon Alexa does not support playing audio from YouTube. In fact, it only supports a limited number of third-party audio-based skills like Spotify music. Otherwise, all default Alexa skills that use audio are tied almost exclusively to Amazon services. This project contains the code for an unpublished skill that allows users to search and play audio from YouTube. For example, a user might say:

Alexa, search YouTube for Frost Hyperventilate.

This skill performs a search, finding the most relevant video that matches the query. It then streams the video (audio only) to your Alexa device for your enjoyment. :)

Setup: The instructions have been moved to this repository's wiki page.

Disclaimer: This skill is not officially supported by YouTube and will never be published on Amazon. It was originally intended as a proof-of-concept, but instructions on setting it up are provided (see above).