I just noticed that Google Colaboratory offers the script for using the local machine's webcam.

Steps

• Step1 Go to Google Colaboratory
  https://colab.research.google.com/notebooks/intro.ipynb#recent=true

• Step2 Create a new notebook

• Step3 Click snippet panel
  

• Step4 Click Camera Capture
  Click insert

• Step5 Run script
  Shit + Enter

YOLO on Google Colaboratory