Considering, we all ARE on a blockchain fellow Steemers, all your posts end up on the Steemit chain, for now, that technology doesn't allow us to upload media to the Steemit blockchain. If you have media embedded like foto's or video's, and host them on 3rd party services like postimg.org or youtube.com it's quite possible your content can be removed one day.
postimg hosted image:
Image courtesy of: https://steemit.com/steemit/@thedashguy/steemit-and-the-importance-of-it-s-censorship-resistance-angle-steemit-could-stop-intruding-governments ( 
Consider self-hosting your media, but this could bring your anonymity in jeopardy, in case that is valuable to you.
What do we think about: storj.io or Maidsafe? I'm not sure if this could help us Steemers.
Let me hear your 2 cents in the comments.
Maybe 
YouTube hosted video from this previous post: https://steemit.com/introducemyself/@johnster/hi-lil-mr-bowie-here-and-i-m-a-confessing-youtube-addict-dog-rescue-please-read
All my contributions can be found here: https://steemit.com/@johnster
Please check my introduction and hit follow. Thanks.
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There is a difference between knowing your shit and knowing you're shit.
Take care:
Johnster