Since like forever but it depends on the app you're using.
Discussion
Damus. But haven’t been online that much
Not only will they upload directly, but if you have a nostr:npub1nxy4qpqnld6kmpphjykvx2lqwvxmuxluddwjamm4nc29ds3elyzsm5avr7 account they will automatically upload to your private library based on your npub