Yes, you can.
You can use the AssetDelivery API (https://assetdelivery.roblox.com/v1/asset/?id=LibraryID&version=VersionNumber) to get the video file that was uploaded to the ROBLOX site.
Here’s a video that you can rip right now, if you’d like.
Just get the asset ID, insert it into the API, and enter a version number (0 is the latest!) Then, change the file format to .MP4.
The result you get should be this! I hope this helped. 