To make your Google Sites as dynamic and interactive as possible, one option is to incorporate video. While embedding YouTube videos via Inserts > YouTube is straightforward, we've received requests for embedding video in the background.
Although embedding video as a background is not natively supported in the new Google Sites, there are workarounds to accomplish this.
First, convert your video (such as an MP4 or AVI) into an animated GIF. Note that if the video is too long or high-quality, the GIF file will be large and may take time to load on your Google Sites. We recommend embedding very short videos.
Select the background in the section, and under Section Colors, choose Image > Upload. Then, select an animated GIF, and you will see the animation in the background.
If you have an animated GIF file in your Google Drive, choose Image > Select > Google Drive and select the GIF file.
You can choose Image > Select and then select the 'By URL' option. You can search for and add an animated GIF from a GIF search engine like Tenor by copying the image address.
You can check out all these options on the demo website here: https://sites.google.com/view/sitesdemo-background/home
For professional pages on Google Sites or for any other issues, you can contact us directly or post your question on our websites or visit our Facebook page.