I have a LG 32LF6310 smart TV and basically it cannot work with the WD DLNA service in MyBookLive at all. It took 15-20 seconds to jump from one page to another and over 30 seconds to start a video. Some video files simply refused to play on my LG smart TV.
I disabled the WD DLNA service, compile and install minidlna into MBL, and the response time is suddenly down to 2 to 3 seconds with Ethernet wired connections. With some source code modifications, minidlna can also support real media (.rmvb) files in which the WD dlna service cannot.
There is an excellent Youtube Video Tutorial on how to install minidlna into MBL ‘Video tutorial install minidlna My Book Live (Firmware. 02.43.03-022) - YouTube’. There are minor changes in procedure required for the recent firmware version. Please also refer to the comments under the video on this.