Fix Video Blocks in non Chromium browsers

[decrek]

Changes

add feature check for navigator.connection since it is chromium only making video blocks fail outside of chromium browsers

Associated issue

Resolves #249

How to test

Test Video Block in non Chromium browser

Checklist

• I have performed a self-review of my own code
• I have made sure that my PR is easy to review (not too big, includes comments)
• I have made updated relevant documentation files (in project README, docs/, etc)
• I have added a decision log entry if the change affects the architecture or changes a significant technology
• I have notified a reviewer

[cloudflare-workers-and-pages]

Deploying head-start with    Cloudflare Pages

Latest commit:	ef91768
Status:	✅  Deploy successful!
Preview URL:	https://efc01ba8.head-start.pages.dev
Branch Preview URL:	https://fix-video-block-fails-outsid.head-start.pages.dev

View logs

[jurgenbelien]

I would personally write the whole function as:

#useDataSaveMode = (() => {
  const navigator = window.navigator as Navigator & { connection?: { saveData: boolean } }
  return navigator.connection?.saveData || false; 
})()

But the outcome is the same.

[jbmoelker]

❤️