This should be possible to do with a majority of video hosting platforms, but the process for doing that will vary from provider to provider.
With YouTube videos, our YouTube Widget should have settings on it that will allow for this.
For other videos, you may need to adjust the video's URL or embed code to add certain parameters onto/into it that will allow for autoplaying. For example, with Vimeo, you can adjust a video's URL to make that possible as detailed in their documentation here:
Note: per most web browser restrictions, videos will need to be muted in order to automatically play, so you will need to add parameters for muting into your video links/embed codes as well.
Please contact firstname.lastname@example.org with any further questions on this!