Removing something from a video by hand means masking it on every frame, then painting in whatever should have been behind it. That is 300 frames for ten seconds of footage. MarkRemoverAI does it in one click. You tap the object once, it is tracked across the clip, and the background behind it is reconstructed frame by frame. Most tools that do this well are paid desktop software for Windows. This runs in the browser, returns your clip at its original resolution, and is free to try with no card.