Although YouTube is widely used worldwide, little is known about how pre-K-12 teachers employ it for instructional purposes. This article reports findings from a national survey of U.S. pre-K-12 teachers (N = 393) on their instructional use of YouTube. Nearly three-quarters of respondents reported using the platform as a classroom resource, with almost half doing so at least daily or weekly. On average, teachers devoted 17.9% of instructional time to watching videos, often alongside lectures, group work, and independent practice. These findings underscore YouTube's important role in supporting instruction and enhancing teachers' content knowledge.