In order to embed a video in Squarespace, you will first need to find the video file you want to embed and then follow these steps:
1. Click on the Insert tab in the Squarespace toolbar and then click on the Video icon.
2. In the Video Insertion dialog box, click on the Browse button and select the video file you want to embed.
3. Click on the Embed button to embed the video.
4. Click on the Preview button to preview the video.
5. Click on the Publish button to publish the video.
Now that you have embedded the video, you can share it with your followers by clicking on the Share button and selecting one of the sharing options. You can also add a caption to the video, if you want.
Finally, you can click on the Publish button to publish the video.