我们正在录制婚礼仪式作为纪念。

We are ___videotaping the wedding ceremony for keepsake.

家长正在录制孩子弹钢琴的表演。

The parents are ___videotaping their child's piano performance.

老师正在录下这次讲座以便学生复习。

The teacher is ___videotaping this lecture for students to review later.