If you are uploading on YouTube, yes you may cross post it to DTube and earn Steem rewards at the same time!
OneLoveDTube community offers a service to pin your videos to our IPFS node so that if the video becomes unavailable on DTube's servers it will remain playable.
Also servers that you can run IPFS aren't very expensive. For now we're offering this service to pin 480p and 240p videos for free (on discord), and if you need to pin HD videos you can opt to pay either me or @graylan $10 usd worth of Steem a month to get access to HD pinning commands. Not a lot of money (probably cost less than a 20% @dtube vote a month).
Disclaimer: I'm the developer of the IPFS Discord Bot 😉
If DTube and OLD evolved to this state maybe I'm wrong, and you have more options right now than few months ago :D I will check it. I'm on OLD Discord since my beginning :D