chore: add latency estimate to demo

[adrums86]

Description

Use #EXT-X-PROGRAM-DATE-TIME tags when present https://datatracker.ietf.org/doc/html/rfc8216#section-4.3.2.6, to estimate the latency of the current segment, adjusting for the time elapsed within the segment.

Specific Changes proposed

Please list the specific changes involved in this pull request.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.39%. Comparing base (8456cb3) to head (ab8de9b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1541   +/-   ##
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  Coverage   86.39%   86.39%           
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  Files          43       43           
  Lines       11165    11165           
  Branches     2552     2552           
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  Hits         9646     9646           
  Misses       1519     1519           

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[adrums86]

Going to close this because I don't think this is necessary and was more of a POC for informational purposes.