Opigno Video app

Hello, For some time i have been trying to setup Opigno Lms (v. 1.23 ) in our company's server, but i'm having a couple of problems. The main one is Opigno Video app. I had problems installing Video transcoder, so i turned it off. (tried everything suggested in here: https://www.opigno.org/en/forum/support/solved-videos-apps and more... The ffmpeg actually works from cmd, but i couldn't change path in admin/config/media/video/transcoders. ) I also configured opigno as shown in Opigno video app tutorial: https://www.youtube.com/watch?v=P7nktrm_iE8 ( 1.Configured CKEditor 3.6.6.2.7696 2.configured slide content type by adding existing video field and managing display options to be above in video player format ) But no matter where i put a video in the slide or in the description i can't see it. Even in videos tab (http://ssd-vm-opigno/node/3/videos) i see it existing in a list, but no video is shown when i open it to preview. And it's not what it isn't playing, it doesn't exist in div class = "content" tag. Please, help!