The energy consumption of video streaming and the amount of CO2 emissions can basically be attributed to three factors: Data processing (in data centers), communication networks (landline, mobile) and terminal devices. The actual energy requirement heavily depends on the quality in which videos are streamed and the devices they are consumed on. For example, CO2 emissions can range from 30 grams (smartphone, landline, 1h of video material in 720p) to 170 grams (65" TV, landline, 1h of video material in 1080p). While the share of terminal devices, in the total energy requirement for video streaming, when using a smartphone is only around 2%, it is already over 40% for a TV set. If content is requested via the mobile network, the energy requirement increases considerably.   filmfriend works with cloud-based technologies. Comparing that to a classic on-premise hosting on servers operated in-house, we can achieve up to 93% of energy savings. Our hosting partner, which operates the data centers, has been CO2-neutral since 2012 and has set themselves the goal of switching to 100% renewable energy by 2025.