There are dozens of video converters out there, each with its own strengths and specific advantages, but at the same time very few deliver complete functionality at zero cost, something many users genuinely need. One of those exceptions is Miro Video Converter, which besides having several presets to simplify converting videos for mobile devices, also offers support for the WebM container.
If the idea is to publish a video on YouTube, the platform itself should handle any required conversion. In fact, YouTube's official help section mentions thirteen accepted formats, ranging from MOV and AVI to FLV and Windows Media Video. WebM also appears on the list, which makes sense considering the container's development was originally sponsored by Google. On the other hand, WebM serves as a compatibility format on older Android devices (2.3 Gingerbread was the first to support it), and on some Linux distributions that don't get along well with proprietary codecs.
Do you need to convert a video to WebM? If the answer is yes, one of the shortest shortcuts is Miro Video Converter. Load the video through the interface, choose the WebM version you prefer (SD or HD), and click "Convert". The advanced options let you change the video's aspect ratio and resolution, but in general everything works better if you leave those parameters intact. Unfortunately there are no audio settings, so you'll have to fly a bit blind in that regard. The available conversion presets are focused on Apple devices, several Android smartphones, the Kindle Fire, and the old PSP.
Now, one thing you shouldn't do is expect a miracle of speed or high performance from Miro Video Converter, especially if you work with high definition. After all, its last stable build dates back to December 2012 (hence its use of the VP8 codec in WebM), and conversion tasks are carried out single-thread, with 32-bit executables. In most cases, that would be more than enough reason to look for another conversion alternative, but if you've decided to prioritize compatibility and ease of use above all else, Miro Video Converter has what you need.
