Setting speed() to values > 8x causes playback to stop.

[tothemoonn]

Even in a program that only opens a video file (1280 x 720, roughly 700MB .mp4, stored locally) and adjusts speed() in response to a key press, playback fails at 16x (increments used are 2, 4, 6, 8, 16 etc.) 100% of the time, with no issues at lower speeds.