Thanks a lot for your support. I have solved the problem with your directions. I have to make some changes on css.core.css at DT and also at my theme directory. Then I have to make changes on mediaelementplayer.min.css at wp-includes. Now my player is working good. Thanks again.
Thanks a lot for the reply. I don’t know the actual developer of that theme as I have started working on an existing website. But let me confirm you that it was good some days before. So may be the problem is somewhere else. Hence I have tried to change the time controls on core css as you advised, but it didn’t make any change. Is there any way to force that height with css from the header?
Thanks for the suggestions. I have tried all the options from dropdown as you told. But the result is same. What else can I do now?