fix(live): cue end time not finite

[adrums86]

Description

When creating metadata cues, the last cue uses the videoDuration as the end time, in live playback this is Infinity and throws an error.

Specific Changes proposed

Add an isFinite check to the duration, if it's not finite we use 0 instead.

Requirements Checklist

• [x] 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[bot]]

Codecov Report

Merging #1411 (8acd120) into main (a9ff947) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1411   +/-   ##
=======================================
  Coverage   85.56%   85.56%           
=======================================
  Files          41       41           
  Lines       10146    10147    +1     
  Branches     2352     2353    +1     
=======================================
+ Hits         8681     8682    +1     
  Misses       1465     1465           

Files Changed	Coverage Δ
src/util/text-tracks.js	89.47% <100.00%> (+0.07%)	:arrow_up:

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