LG VX-8600 / AX-8600

Is it possible to hear my voice memos and Vcast videos through the bluetooth earpiece? I cannot figure out how to do it. The sound always comes out of the speakerpone which is terrible quality and of course no privacy. I could do it with my old audiovox phone so I am quite dissapointed so far.

Also..is there an online manual available? All I have found is the quick reference guide. Thx.