The answer is yes.
As the Internet continues to become more mobile friendly, and browsers change requirements; self-hosted video on your website must accommodate these ever changing standards.
Self Hosted Video Requires Formatting
If you are hosting your video on your server and wish to place it on your website, consider that a simple .mp4 file just won’t cut it anymore. You need to make sure your video can be seen on a myriad of browsers and mobile devices.
Question: Do you need to convert your .mp4 file?
Answer: Yes you do.
Question: What formats do I need to convert them to?
Answer: You must convert self-hosted video into two additional formats. webm and ogg.
Question: Do I have to download software to convert my .mp4 file?
Answer: No, there is an awesome FREE online resource at http://video.online-convert.com/
For more information on video formatting for the web visit https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats