Hi Madosha! If the video on the TV and audio from the soundbar are not synchronized, press the Sound Control button to select AUDIO SYNC and then set the audio delay between 0~300 milliseconds by using the Up/Down buttons. For additional support troubleshooting the issue, please reach out to Samsung audio support at:
Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri
LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you.
^Tim