Hello Tabitha-
Thanks for the excellent question! The good news is that this is actually easier for self-hosted video files than for YouTube videos to do without any coding.
If you’re using the BoldGrid Post and Page Builder for WordPress or the Classic Editor, click on your embedded video and click the Edit (Pencil) icon, where you’ll find options to Autoplay, and loop the video:
If you’re using the WordPress Block Editor (Gutenberg), look for the options in the right-hand side. You may need to select the option to Show more settings from the block’s 3-dot “Vertical Elipsis” menu: