Index of downloads.webmproject.org/releases/webm

Name                                             Last modified               Size

Parent Directory
vp8-test-vectors-r2.tar.bz2                      2010-09-09 07:03:06-0800    3.14MB
vp8-test-vectors-r2.zip                          2010-09-09 07:03:06-0800    3.19MB
WebM Component Installer.pkg                     2010-12-10 11:30:06-0800     334KB
webmdshow-1.0.3.0.zip                            2014-10-24 16:04:58-0700    1.29MB
webmdshow-1.0.4.1.zip                            2015-01-30 11:30:06-0800    1.35MB
webmquicktime-src-0.2.0.tar.gz                   2010-12-10 11:30:06-0800      89KB

libvpx tarballs for download are auto-generated for each release, and are available
at URLs of the form

https://chromium.googlesource.com/webm/libvpx/+archive/v1.7.0.tar.gz

Substitute your desired version number, and examine available release tags here.