Thanks for your help. Yes they are in Content/Movies. I’ve set and reset the directories many times. Two are wmv’s and one is mp4. One of the wmv’s works, the other does not as well as the mp4. I just tried the movies in the first person template in 4.12 and to my surprise they still did not work. I made a sphere with one of the wmv’s as its material. It played in the viewport and then in standalone the sphere disappeared. In addition, strangely, the wmv that works in my game does NOT work in a fresh blank project.
To be specific about what I did - I imported the video, made a media texture, made a material from that. Then I made an actor blueprint with a sphere and applied the media material to the sphere. I also made a media player variable in the blueprint and set the media file to that variable. In an event (in this case, begin play) I dragged out the variable and connected it to a play node so it would be sure to play. In the viewport - all is well. In package AND in standalone, the actor blueprint is vanished.
Thanks for any help!