Heathis.at is quite easy. On https://hearthis.at/upload/ you have different opportunities. One of this is also soundcloud import.
On mixcloud, you can import all your tracks on https://www.mixcloud.com/soundcloud/import/ .
Youtube has no official import. But you can use a tool of hyperedit.
On https://hypeddit.com/soundcloud-to-youtube you can upload a track to your youtube canal.
First, connect your soundlcoud profile. After it, you can choose one of your tracks.
Scroll down, connect your youtube canal and convert and upload it.
Don’t worry it will take 5-10 minutes.