Down below are explained the steps on how to copy the embed codes for several video hosting websites. For most websites, you can find the option by clicking on the "Share" button.
On the video's web page under the video, click on Share, select Embed, and copy the link as shown below.
For Vimeo, click on the feather icon (Share) on the video to display the Embed code.
To embed a video from Wistia, navigate to your video and click on the "Embed & Share" button. Then select Inline Embed, as well as make sure that the Standard embed type is selected in the pop-up. You can then copy and use the embed code found in the pop-up.