Most web video is 24, 30 or 60 fps, but your monitor refreshes at 120, 144 or even 240 Hz, so fast motion looks choppy. FrameBoost generates the missing in-between frames in real time, using optical flow on your GPU (WebGPU), so every refresh shows a new frame. 100% local: no uploads, no accounts, no tracking. Free compare mode to see the difference on any video. Works on YouTube and most HTML5 players.