Techniques described herein may be used to seamlessly insert advertisements into media programs without a significant change in required bandwidth. A client device (e.g., a smartphone, a set-top box, etc.) may begin downloading and presenting a program to a user in real-time. Before a scheduled advertisement period, the client device may stop downloading the program and begin downloading the advertisement, while continuing to present the program from a buffer. As such, the client device may seamlessly transition from the program to the advertisement in accordance with the advertisement period. The advertisement may be downloaded at an enhanced rate so that the advertisement is completely downloaded prior to the termination of the advertisement period. As such, the client device may resume downloading the program before the advertisement is over, such that the client device may seamless transition back to the program once the advertisement is over.