Stehinch:
Audible, I use it all the time, and the books I can’t find on there I generally can’t find anywhere in audio format legally or …
YouTube/YTmusic, also get used. Re the comments about the screen, if you pay for premium you remove all the adverts and you can close the screen. Ice got mock the week in the background while typing this, it’s about £9a month I thinkSent from my S41 using Tapatalk
I just stream stuff from normal Youtube and it’s free and then I either chuck my phone in my bag or cover it with my jacket whist I listen
to it through media centre in vehicle. Sod paying £9 a month, I’m too stingy! Lol 
All us lot streaming from Youtube, podcasts or whatever else are committing an offence anyway, and I doubt it’d make any difference
whether your screen was locked with the premium version, or wide open… you’re STILL streaming data and it’d still be an offence!