Every once in awhile, whenever I try to load a movie and enjoy it at home, I receive errors like "Format not supported" or "Unable to load video". The easiest way to solve this problem is to use an efficient video converter and change the format of the video to one supported by the used video player.
One application that seemed to me as an effective solution for the issue above was Freemake Video Converter. This program made a good impression on me from the first launch with its friendly interface and easy-to-use functions.
There's a full list of advantages of using Freemake Video Converter, from batch processing and the existence of a multimedia player to a slideshow creator and an integrated YouTube video downloader. Though, the one thing I didn't like about this program was the inability to make individual format selections when converting more than one file.
The converting speed will mainly depend on the quality level of your hardware, as the program requires high CPU resources usage.
I personally advise you to use Freemake Video Converter, especially because you will never have to acquire it and it offers you professional service with a multitude of advantages.