Hi! If the video on the TV and audio from the HW-Q65T Soundbar are not synchronized, press the SOUND CONTROL button on the soundbar remote, until you see AUDIO SYNC on the display. You can then set the audio delay between 0~300 milliseconds by using the Up/Down buttons.
Please also make sure you are running the latest firmware update (ver1006) which includes improved connectivity. You can update your firmware by using a USB device. Should you need additional assistance with this, please reach out to Samsung Support at: 1-800-SAMSUNG, available 8AM - 12AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/
^Tim