I have been struggling with the terrible lip sync on many of the aps on my 55W755c for some time. One tip worth passing on is for watching any movies bought through Google Play (particularly good value at £1 now for many). Instead of watching through the dedicated ap (which has a severely delayed sound feed) try going into YouTube and looking under the "Purchases" tab: I have found that all my bought films are listed there and play perfectly without lipsync problems. Note, however, that your playback position is not remembered when using this form of streaming, so you have to get used to noting down how many minutes into the programme you are should you wish to exit temporarily. Wish Sony would sort out these lip sync issues asap!!
