First, select the video/video segment, click on "Share" under the video, which brings up the "</>Embed/Link" button in the popup box. You can embed into web pages via the link or in a box.
Once you click on "</>Embed/Link" you can choose the "Embed Size" and then copy and paste the embed code into D2L or your website.
Be sure you are linking to what you want; are you linking to a complete film or to a segment? Get the right URL for what you want others to see!