While checking Xcode 8.2 changes I found that now we can record simulator using Terminal.
So I am trying to record video from iOS simulator as describe in this Apple Doc
this was also fixed in Xcode 8.3 Beta: http://adcdownload.apple.com/Developer_Tools/Xcode_8.3_beta/Release_Notes_for_Xcode_8.3_beta.pdf
• Videos recorded by the simctl tool of the xcrun command line tool now support scrubbing and import into video editors correctly. (29654098)
I did not test this currently but it is quite possible that in stable version of Xcode this bug will be fixed