Hi Ly Duong,
Thank you for contacting us on Microsoft Q&A forum.
Microsoft announced that new video and audio uploads will be discontinued May 15, 2024. But no worries, previous sways will not get affected but only the newly created ones after May 15th. We recommend that you embed video and audio files by following the instructions at Embed content in your Sway.
__Note: __If you paste a URL (web address) as your embed code, it must contain the secure prefix https:// instead of http:// or your selected content will not be embedded.
You can create a support ticket on the Microsoft Community for any additional Sway-related support and continue the extended discussion.
If you feel that your queries have been resolved, please accept the answer by clicking the "Upvote" and "Accept Answer" on the post.