Ask HN: How to preserve my documents and videos for 20 yrs?

So, with Covid going on, I am afraid that if anything happens to me, my kids won't know anything about me when they grow up. So, I want to record a few videos, collect a few photos, make a few documents and post them in some place online and make sure it is discoverable by them after 20 yrs? I am not very worried about privacy. What are my options?

Kids are 6yrs old now. One thing that comes to my mind is prepay google drive $5 per month for next 240 months. What do you say?