Please specify your UNA version, also check if your ffmpeg binary is for correct platform, by default we use ffmpeg for Linux and check if ffmpeg permissions are correct in Studio > Dashboard > Host Tools > Permissions
In the /storage/ directory there are a number of bx_... directories. All of them were owned by www-data except bx_timeline_videos_processed which was owned by root. I did a chown -R www-data:www-data bx_timeline_videos_processed and now posts from yesterday are showing up with working video's.
I have to check with other users to see if their videos are now working as well.
very interesting.. i see all my videos in the storage directories and however i dont even have a transcoder error log, but am a bit stuck on my setup. this was one of the only threads i had not read fully yet and checked off step by step..