Android Lollipop phone - in need of some help

[bdbdbd]

I'd remember HTC would be the closest to stock Android, most manufacturers use their own interface. I have LG.

Now I found how to change my SMS tone, but I could only choose from the LG preinstalled ones. I need to play MP3 file from my memory card.

E: Ok, so it seems the contacts need to be imported from the SIM-card to the phone memory, and after importing, you can set the ringtone. But can you set video as a ringtone? I've had a certain video as a ringtone for my wife on various phones since 2008 or 2009 and I'd like keep using it.