Blender comes with a built-in video sequence editor allows you to perform basic actions like video cuts and splicing, as well as more complex tasks like video masking or color grading.
The Video Editor includes:
Live preview, luma waveform, chroma vectorscope and histogram displays.
Audio mixing, syncing, scrubbing and waveform visualization.
Up to 32 slots for adding video, images, audio, scenes, masks and effects.
Speed control, adjustment layers, transitions, keyframes, filters and more!