user4943: I know that Matroska does have a way to remove the border by editing its metadata, and i also know that Webm is a cheaper version of Matroska. I have tried using MKVtools to edit Webm and it appears to work, but then when i play the file nothing changes.
So does Webm support metadata removal of border from the video? If it does what tool can i use to perform this task?

user29988: See here https://www.webmproject.org/docs/container/ under section Track. There you find PixelCropBottom, PixelCropTop, PixelCropLeft and PixelCropRight - all of which are supported. These parameters should do what you want. They also exist for Matroska.
Look for a tool that can manipulate those parameters.

4943: <p>I know that Matroska does have a way to remove the border by editing its metadata, and i also know that Webm is a cheaper version of Matroska. I have tried using MKVtools to edit Webm and it appears to work, but then when i play the file nothing changes.</p>
<p>So does Webm support metadata removal of border from the video? If it does what tool can i use to perform this task?</p>
 29988: <p>See here <a href="https://www.webmproject.org/docs/container/" rel="nofollow noreferrer">https://www.webmproject.org/docs/container/</a> under section Track. There you find PixelCropBottom, PixelCropTop, PixelCropLeft and PixelCropRight - all of which are supported. These parameters should do what you want. They also exist for Matroska.</p>
<p>Look for a tool that can manipulate those parameters.</p>
