The basis for working with videos in Microsoft 365 is having video files stored in SharePoint, Microsoft Teams, & Yammer with the ability to create destinations that feature video content in your Viva Connections and SharePoint-based intranet. For more background information, see: Overview of featuring videos with web parts, pages, sites, & portals.
When you want to feature a single video on a SharePoint page and be able to play the embedded video inline, you can use the File and Media web part.
After adding the File and Media web part to your page, you can select a video file from your site, another site, or from a link. Visitors to your page will be able to play the video directly on the page.
See also
Overview of featuring videos with web parts, pages, sites, & portals