Methods, systems, and apparatus, including computer programs encoded on computer storage media, for video buffering are provided. One of methods includes: determining a buffered video interval in a video according to a video play position and a video buffered position of the video; determining a to-be-buffered target video interval in the video based on the buffered video interval; performing fragmentation on a video part that is not buffered, not fragmented, and in the to-be-buffered target video interval, to obtain at least one fragment; and buffering each of the at least one fragment.