1) It will be more helpful if each video added to media manager has a thumbnail, so we can see at a glance what a video will display (just like photos thumbnail)
2) In my church, tag V1, V2, C, etc. added to a song is not very important. What we usually do is just dividing a song lyric into slides, no matter what the tags are. I think it would be nicer if OpenLP has a added feature that allows users to divide a song lyric into slides by easier and faster way (besides by setting verse 1/2/3/etc and clicking Insert). I mean, by a keystroke (Enter, Tab, etc) for example.
3) It will also very helpful if OpenLP can resize image and video to fit (or fill) the projection screen.