[Feature] Support video demos

[cir7]

Motivation

[Feature] Support video demos

[codecov]

Codecov Report

Patch coverage: 11.11% and project coverage change: -0.13 ⚠️

Comparison is base (a9a0957) 76.25% compared to head (5c5575c) 76.13%.

❗ Current head 5c5575c differs from pull request most recent head 68a2f4b. Consider uploading reports for the commit 68a2f4b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2602      +/-   ##
==========================================
- Coverage   76.25%   76.13%   -0.13%     
==========================================
  Files         170      170              
  Lines       13904    13930      +26     
  Branches     2375     2380       +5     
==========================================
+ Hits        10603    10605       +2     
- Misses       2732     2755      +23     
- Partials      569      570       +1     

Flag	Coverage Δ
unittests	76.13% <11.11%> (-0.13%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmaction/apis/__init__.py	100.00% <ø> (ø)
mmaction/apis/inference.py	66.38% <11.11%> (-16.41%)	⬇️

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