Message for "video snap on" block

Please fill out these questions for all feature requests and bug reports. If you're requesting a feature, please let us know why this feature is important or useful, not just what it should do.

  1. What browsers show this problem?
    I guess al browsers
  2. Describes the steps to reproduce this issue.
    Just run the "VIDEO snap ON myself" block
  3. What does Snap! currently do?
    Shows a message suggesting to switch to https
  4. What should Snap! do instead?
    Snap should also warn that the video could be already in use by another application (as happened to me)
    Is this bug a security concern?