Creat youtube video speech with envato video and audio in background

Hi there

i would like to use envato video with audio music in the background to create the videos for youtube motivational speech.

  1. Do I have to use Envato Elements for 16.50 / Mon to use all envato videos and audio?
  2. if I no longer use Envato Elements can my videos remain on youtube or do I have to delete them?
  3. if I have my voiceover with audio from envanto in the background, can I resell the speech on iTunes? do I have to link accordingly or can I resell without further ado?

I hope someone can help me

only the best