https://tools.wmflabs.org/videotutorials/: http://i.creativecommons.org/l/by-sa/3.0/88x31.png https://tools.wmflabs.org/videotutorials/: http://www.w3.org/html/logo/badge/html5-badge-h-multimedia-performance-semantics.png https://tools.wmflabs.org/videotutorials/: https://i.creativecommons.org/l/by-sa/3.0/88x31.png https://tools.wmflabs.org/videotutorials/: https://licensebuttons.net/l/by-sa/3.0/88x31.png
Loading from external providers are discouraged. Please see parent tasks and J65.
Unfortunately I don't think we have a shared place to store these buttons. You may want to host the image locally in your tool.