For what it's worth, the upper right video box works. I'm working on another sequence in the project, pulled in some video, and it's working perfectly fine.
Okay, let me try to be more clear, as I'm not getting any responses. When I'm in the Timeline and hit play, so I guess the video should be playing in the Playback viewer in the upper right. In the middle top, I actually have double-clicked on the clip so it's showing up like it's supposed to in the source monitor. Any idea why I'm getting the "Media Pending" message?
Is the media pending appearing on just the clip you are parked on in the timeline, or on the entire sequence?
Go to the head of that clip on the timeline and type Option + [ to set the work area at the beginning of the clip, then move to the end of the clip and type Option + ] to set the end of the work area to the end of the clip.
Now go to the menu Sequence > Delete Work Area Render Files. Does the clip reappear once unrendered?
I finally found another discussion with a related issue. They said I need to cut out my preferences, or something like that, but the easy solution was to copy the files on the timeline and paste them into a new sequence. I did that, and it's working in the new sequence.