The three primary buttons of the video playback bar offer previous frame, play/pause, and next frame. These have corresponding keyboard shortcuts of left arrow, right arrow and space.
Shift+Left arrow and Shift+Right arrow can be used to seek back and forward by one second rather than one frame.
There are also speed controls (0.2x, 0.5x, 0.8x, 1x, 1.2x, 1.5x, 2x, 4x) to allow the video to play faster or slower than real-time.
You can click on the seek bar or drag the thumb to navigate to an approximate time. To the right of the video player seekbar the time display indicates the current video position and the video duration.