How to add video in Squarespace
In the Library select the video you want to embed in your webpage.
Click on Actions and choose Get page embed code. Dialog will pop up and you press the Copy button. Now you have the embed code in your clipboard.
Go to your Squarespace site’s editor.
Start with creating a new element where the video should appear. Choose the Code element. Alternatively, you can also use the Video or Embed elements.
Check the selected mode is HTML and paste the code in place of the example code. The video should now show on the page.