Yes! A part of having freedom to post whatever you want on #nostr is supporting the network you post on. 

For every post, photo or video you upload someone has to store that on a computer somewhere. 

Facebook, TT, YT, IG, etc can do it for you, but they can also censor you, delete all your data or sell you out to marketers.

Posts and pics are free to post here, but videos are not. You have to pay for a service like @nostr.build to post anything longer than a few seconds. 

You pay small amounts for some of the services you are used to, but have lots of peace of mind about it.

Hope this helps. Please feel free to ask if you have questions.