Are you wanting to burn the 720p file to the DVD? If you are burning the file to the DVD and the DVD player can read that format, then it will play in its native resolution. If you are converting the HD format to DVD format, as long as your blu-ray player is connected to the TV via HDMI cable, up conversion should occur. Most blu-ray players will up convert DVDs if the player is connected to the TV via HDMI.