Summary: Hypothesis adds service issue alert

Why It Matters: This shows Hypothesis is having problems. It tells users about issues and where to find updates.

What Changed:

• A message about "intermittent service issues" was added.
• A link to a "status page" was added.
• The video player error message changed from a generic "Use Up/Down Arrow keys..." to "Media error: Format(s) not supported or source(s) not found" and a "Download File" link.