Roku devices only play a limited number of video and audio codecs. They also only support a handful of containers (the three letters/numbers at the end of the file). Usually Roku can play MP4 files without an issue. They also support the MKV, MOV and TS container, but the codecs within those containers might not be playable. You would need to provide more detail about your video to figure out why it won't play. There are free programs like MediaInfo that can provide that information.
I checked. They are mp4
OK, MP4 files usually have supported codecs within them, but without verifying the codecs there's no way to know for certain.
Will Mediainfo tell me that?
As I posted, the video loads but doesn't play, all the mp4 videos do the same. A circle in the middle of the screen but nothing, nothing moving in the cir le as if it was loading. And these videos played when I first installed the Roku. I thinking of deleting the app and resetting the roku, then installing.
