My video was refused.

1. Open Posts, then Needs attention, and read why. Open Posts
2. Too long? Check the limit for that network in How long can my video be?
3. Most networks want an MP4 file. Save or export your video as MP4.
4. Press Edit on the post, remove the old video, drop in the MP4 and press Post now.

If other networks already took the post, make a new post for the one that refused it.