problem with video

Hello! I tried to embed a youtube video, but after 10 minutes i see only the loader.  Why?

some you tube videos just will not embed, something about the description field being too long...

Its not the description field thats too long.. sometimes the actual embed link isn't to the actual video. For example. If you watch a video and look to the right of it and find smiliar videos and click one to watch.. sometimes the link.. is to long and it can't find the actual  video. Are you using direct link like

youtube.com/videolink to embed? or the embed code. Also some users turn off embed.. which sucks because I have keywords setup to auto import videos into my video player. some import.. but I get the message.. "Users has disabled embedding"

Initially , dolphin was installed on a server that hasn't ffmpeg. I tried on another server, and it works....so i think that the problem is in the presence of ffmpeg.