What does video radio or song radio mean on my youtube history, but on my activity through Google

[Android Central Question]

com.samsung.networkui

com.samsung.sdm.sdmviewer

com.samsung.android.messaging

com.samsung.huxextension

I can be watching videos that were uploaded by the artist, for example "Sunflower" from the Spiderman Soundtrack & it will start a playlist & end up playing that song under "Sunflower-Topic"

Any help would be greatly appreciated...