support video part of live streaming details

[dusking]

No description provided.

[MerleLiuKun]

Welcome for your PR.

If you format the code to let the ci running well, I will quickly merge it.:)

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (9629f11) compared to base (23bf131).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 9629f11 differs from pull request most recent head ae39df0. Consider uploading reports for the commit ae39df0 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #122   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           26        26           
  Lines         1388      1397    +9     
=========================================
+ Hits          1388      1397    +9     

Impacted Files	Coverage Δ
pyyoutube/utils/constants.py	100.00% <ø> (ø)
pyyoutube/models/video.py	100.00% <100.00%> (ø)

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