Can I make the video clip of less size

[Zombi]

My daughter has with her telephone record a video clip with my grandson as I wanted to put on face book, the problem is that the 27 sec. approximately 700 mb and it should preferably not exceed 100.
How can it be, it is something of pixels or whatever, I have as much longer clips occupies only from 30 -60 mb.
Is it feasible to make it smaller and how. I thank you in advance if anyone can help.

[JonathanD]

Now I do not know what kind of file it is. But movie maker can create files smaller with custom changes.

Import on movie maker, put it on a time line and save eventually "save as" then proposed (by what)

[Zombi]

Okey, although I didn't understand much I tried to do as you said in the movie maker and I found how to do that. Thank you for the fast help. That worked

[JonathanD]

Yeah
I was going to edit my post to give it in proper way but its great that you found it out yourself. Good going.....