Merge in "release-0.6.8"

Merge branch "release-0.6.8" into "develop"

Summary of the merged in commits:
 * 5f633220: Remove empty lines
 * a9756ea6: Add video and streamline content
 * 26983f19: Add video and streamline content
 * 6d2c7aea: Add video and streamline content
 * 6e681752: Add video and streamline content
 * 0151478b: Add video and streamline content
 * c1268172: Add video and streamline content
 * 4171517c: Add video and streamline content
 * 4d336e46: Add video and streamline content
 * 0f5b4392: Bump version number
 * 5d7b2c47: Add video links to the README.md