WebM Video Format

After using Screencastify, screencasting software working a plugin to the Chrome browser, the resultant video output was in WebM format. I tried uploading to my astrology blog on Blogger using the video upload tool but the rendered video was of poor quality and wouldn't display properly in fullscreen. However, YouTube did an excellent job of rendering the video and providing the embed code that I'm using here:

I was prompted to investigate this format further and to that end, this video on the WebM website was helpful.

As Wikipedia explains:

WebM is a video file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video tag. It has a sister project WebP for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. 

The BSD license is described by Wikipedia thus:

BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the redistribution of covered software. This is in contrast to copyleft licenses, which have reciprocity share-alike requirements. The original BSD license was used for its namesake, the Berkeley Software Distribution (BSD), a Unix-like operating system. 

The associated WebP format for images is described on this site as follows:

WebP is a modern image format that provides superior lossless and lossy compression for images on the web. Using WebP, webmasters and web developers can create smaller, richer images that make the web faster. 

WebP lossless images are 26% smaller in size compared to PNGs. WebP lossy images are 25-34% smaller than comparable JPEG images at equivalent SSIM quality index. 

Lossless WebP supports transparency (also known as alpha channel) at a cost of just 22% additional bytes. For cases when lossy RGB compression is acceptable, lossy WebP also supports transparency, typically providing 3× smaller file sizes compared to PNG.