How is “watch over” used?

In Transformers (2007), one line is: “but watching over them in secret,”

Which movie is “watch over” from?

The clip at the top of this page is from Transformers (2007).

but watching over them in secret,

8 作品で登場 · 1 本目

to take care of sb / sth; to guard and protect sb / sth

フォーマル · 33 本の映画に登場

オックスフォード映画の 94%
to take care of sb / sth; to guard and protect sb / sth
- Please, watch over him. - I'll try.

定義：Oxford Advanced Learner's Dictionary 第 9 版