Do I need to charge to make a video against cold water?

No need, find free video editing software.

Video editing refers to the software for nonlinear editing of video sources, which belongs to the category of multimedia production software. The software mixes the added pictures, background music, special effects, scenes and other materials with the video, cuts and merges the video sources, and generates new videos with different expressive force through secondary coding. Video editing is an application software, which can post-edit digital video on NLE. It replaces the traditional flat celluloid film editing tool and analog video tape linear editing machine. As a nonlinear editing software tool, video clips are usually arranged on the timeline according to the playing order based on the timeline interface. Nonlinear editing software provides various tools for editing clips, including cutting, dividing and cutting, and can also rearrange clips on the time axis. With the development and progress of nonlinear editing software, its functions are gradually expanding. Most consumers and professional nonlinear editing systems have also added the functions of adjusting video color, video correction and visual effects, and can also edit or mix audio synchronized with video sequences.