Why? When any mistake or problem occurs all of a sudden, your videos may be damaged. Tip: I advise you to back up your videos before converting them. This can be very annoying, so people published posts on the internet, expressing their demands for a free video converter no watermark. However, some converters will add a watermark to the video it converts or has a time limit. When people want to change a video from one format to another, they need a converter and most of them prefer a free converter. The resolution, the container format, the video & audio codecs, the bit rate, and even the aspect ratio may be changed during the conversion process. Well, video conversion refers to the process of converting videos from one format to another. It either recompresses the video to another format in a process called transcoding or simply changes the container format without changing the video format. Video converter refers to the program that is able to change the storage format of a digital video.