Here’s what I did:
1. Download aka messenger
2. Press and hold images/videos until you are able to select (then select all media you’d like to eventually save)
3. On the bottom all the way to the right, there should be two arrows pointing to the right as one of the options for your selected media
4. Click on the double arrows pointing right and forward it to your saved messages (should be the very first option with a bookmark symbol)
5. Go to your archived messages and the media you selected should be there
6. View your media individually and save them like you normally would by selecting the 3 dots on the top right. You have to do this for each video/picture, you cannot select in bulk to save them all at once as far as I know.