Display external file formats into Unity Game Objects

Hello everyone,

which external file formats, e.g. from local hard drive, can be loaded into Unity and displayed to a specific game object?

What I have tried so far:

• I used image file formats like .png and .jpg and both works well with http://docs.unity3d.com/ScriptReference/WWW.LoadImageIntoTexture.html

• I wanted to use the same with video file formats like .mp4 but it didn't work from hard drive. I used http://docs.unity3d.com/ScriptReference/MovieTexture.Play.html I have read that the file format should be .ogg from hard drive. So, I tried this and it works well, but is there any other video format that is supported in this way?

• I also wanted to load .pdf and .pptx files into a game object, but I read that there is no possibility to do this directly. It is only possible to write an own custom .pdf renderer to use pdfs in Unity or use something like ghostscript to convert each page into an image.

I am using Unity 5 free version and I am a beginner in Unity.

Can anyone help me, please?
Thanks in advance!