Play audio and video game objects

Hello all,
Again, I apologize in advance if my question may be too silly or newbie. I did try googling before asking, and still can't manage by myself.

In my game, I added a large number of audio and video files as GameObjects. Each of them has a pre-set audio or video source, and a specific name that is easy to remember and track in the game.

What I need:

1) All sounds are played at the beginning, all at once. I know I can disable them from PlayOnAwake one by one, is there a way to do it to whole directory? Not important if by code or built-in function in Unity itself.

2) This question is more important. How can I run an audio or video file using relevant GameObject's name?

I tried this:

Code (CSharp):

1.         GameObject thisObject = GameObject.Find("musTheme3");
2.         thisObject.GetComponent<AudioSource>().Play();

and also this:

Code (CSharp):

1.         GameObject Common_Sounds = new GameObject();
2.  
3.         Common_Sounds.SetActive(true);
4.  
5.         foreach (Transform thisObject in Common_Sounds.transform)
6.         {
7.             if (thisObject.name == "musTheme3")
8.             {
9.                 thisObject.gameObject.SetActive(true);
10.                 thisObject.gameObject.GetComponent<AudioSource>().Play();
11.                 Debug.Log(thisObject.gameObject.GetComponent<AudioSource>());
12.             }
13.         }

But it seems that computer can't find relevant GameObject. ALso, I am not sure that even if he does find it, how to correctly play it?

3) Same about videos, but it can be more complex. First, the computer must find a video GameObject by name, then play it. All videos must be played on full-screen, and only when activated.

This is code I tried:

Code (CSharp):

1.         GameObject thisObject = GameObject.Find("movIntro");
2.         VideoPlayer thisVideo = thisObject.GetComponent<VideoPlayer>();
3.         thisVideo.Play();

I have basic skills with generic Visual Studio, but Unity has a completely different approach.

Thank you in advance,
Evgenie