Unable to play several mkv files

Hello I'm having problems when I try to play several mkv files in my ipad air. I get the spinning wheel for an indefinite period. I tried with the same files in my other ipad 1 with the same results. For example in the log file attached, I try to do this at 1:44 AM.
Please I really need your help with this, because it affect half of my library. thanks. Pablo