For the Integrated portal, you can paste the embed code from e.g. YouTube/Vimeo into the page directly. You can also upload an MP4 video (or whichever format is playable on the web) to the Assets section, and then use the <video> element to show the video. Tip: embed the video as an image to get it's url, then delete the image embed.
<video width="320" height="240" controls>
<source src="/files/SampleVideo_1280x720_1mb.mp4" type="video/mp4">
</video>
In a Drupal portal, use the Media module to handle that.
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