Inclusion Criteria:  Diagnosis of obstructive sleep apnea (OSA) confirmed by sleep study Recent body mass index between 30.0-44.9 kg/m2 Access to DVD player, computer, and/or internet Able to participate fully in all study protocol/procedures including informed consent  Exclusion Criteria:  Inability to speak, read, or understand English Recent weight loss interventions including use of prescription weight-loss medications, participation in group or individual weight loss programs provided by trained personnel, bariatric surgery (or plans for during the study period) Expected weight loss because of alternate explanations such as from illness High variability in weight due to fluctuations in volume status (e.g. ascites - liver disease, chronic heart failure) Safety and/or adherence concerns due to severe physical or mental health issues, or life expectancy <24 months Pregnant, lactating, or planning to become pregnant during the study period Participation in other intervention studies