Create screencast videos of installing Tails onto a USB stick

Originally created by @sajolida on #6387 (Redmine)

I might be useful for some people to have a screencast video explaining how to install Tails onto a USB stick. This should reuse the written documentation, and might even be an opportunity to review it.

Subtasks

• #8610 (closed)
• #8611 (closed)
• #8612 (closed)

Related issues

• Related to #6851 (closed)
• Related to #6853 (closed)
• Related to #7492 (closed)
• Blocked by #8581 (closed)