fix: ensure spatial navigation starts without error without an ErrorD…

[mister-ben]

…isplay component

Description

By default a Video.js player has an ErrorDisplay, but in the event it is created without one, an error will be thrown when starting spatial navigation.

Specific Changes proposed

Only add an event listener to player.errorDisplay if it exists.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
  • Has no DOM changes which impact accessiblilty or trigger warnings (e.g. Chrome issues tab)
  • Has no changes to JSDoc which cause npm run docs:api to error
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.18%. Comparing base (65f8546) to head (114b2f4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8830   +/-   ##
=======================================
  Coverage   83.18%   83.18%           
=======================================
  Files         120      120           
  Lines        8046     8047    +1     
  Branches     1930     1931    +1     
=======================================
+ Hits         6693     6694    +1     
  Misses       1353     1353           

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