Question: how many mb consumes 1 hour of youtube?
Answer: SD quality video is standard 480p video. SD-quality video uses about 0.7GB (700MB) per hour. HD quality video is between 720p and 2K (remember, the app adjusts the stream). HD-quality video uses about 0.9GB (720p), 1.5GB (1080p) and 3GB (2K) per hour.