Use a search engine to find Youtube. From here, find any video you'd like to embed.
Take the video title and code it into your program through a header.
Under the video, click the "Share" option. From there, the "embed" button should be there. Click that and it will give you the embed tag for your selected video.
Through a video tag, code in your video. Use the "iframe=" given in your source.
After your video, add any formatting desired. Then end off your code with closing your tags.