Video cameras have become smaller and increasingly embedded in our social lives. This study investigates the implications of these changes for teachers' work with video in professional development. Specifically, we focus on complexities and opportunities associated with teachers generating videos from their own classrooms, in the context of a short online course where teachers tried several mathematical activities that invited student reasoning and discussion. We unpack the potential affordances of video generation for teacher learning by examining teachers' processes — how they captured video during instruction and selected clips to share — and the characteristics of their final video products. Analyses demonstrated that generating video clips was complex work for teachers, requiring coordination of multiple sets of considerations about their students, the video itself, video viewers, and the course. Further, capturing and selecting sparked different emphases for teachers. While capturing, teachers foregrounded video quality considerations while seeking to support students' experiences. Selecting engaged teachers in curating (and hence attending to) student thinking within their videos. Teachers' video products also demonstrated characteristics known to be supportive of teacher learning. We see these results as cause for optimism about the potential of teachers' video generation for supporting teacher learning.

摄像机变得越来越小，越来越多地嵌入到我们的社交生活中。这项研究调查了这些变化对教师从事专业发展的视频工作的影响。具体来说，我们将重点放在与教师在自己的教室中生成视频相关的复杂性和机会上，这是在简短的在线课程中，教师尝试了几种数学活动，这些活动邀请了学生进行推理和讨论。我们通过检查教师的过程（他们在教学过程中如何捕获视频并选择要共享的片段）以及他们最终的视频产品的特征，来挖掘视频生成对教师学习的潜在能力。分析表明，生成视频片段对于教师而言是一项复杂的工作，需要协调有关学生，视频本身，视频观看者和课程的多组考虑因素。此外，捕获和选择激发了教师的不同重点。在捕捉的同时，教师在寻求视频质量考虑的同时寻求支持学生的体验。选择聘请的老师在他们的视频中策划（并参与）学生的思考。教师视频产品还展示了有助于教师学习的特征。我们认为这些结果使人们对教师视频生成支持教师学习的潜力感到乐观。在寻求支持学生体验的过程中，教师们着重考虑了视频质量方面的考虑。选择聘请的老师在他们的视频中策划（并参与）学生的思考。教师视频产品还展示了有助于教师学习的特征。我们认为这些结果使人们对教师产生视频支持教师学习的潜力感到乐观。在寻求支持学生体验的过程中，教师们着重考虑了视频质量方面的考虑。选择聘请的老师在他们的视频中策划（并参与）学生的思考。教师视频产品还展示了有助于教师学习的特征。我们认为这些结果使人们对教师视频生成支持教师学习的潜力感到乐观。