Good pronunciation channels:
Christina Rebuffet - some videos on pronunciation - fab!
https://www.youtube.com/channel/UCtWyH1MB_A3OggdzoGtkeQA
engvid
http://www.engvid.com/english-lessons/ - choose the pronunciation ones
Oxford Online English -
https://www.youtube.com/playlist?list=PLD6t6ckHsrubLp8Ia8duzu5fN4riM2-Bl
Rachel's English - American, but very useful and good stuff!
https://www.youtube.com/channel/UCvn_XCl_mgQmt3sD753zdJA
engfluent (two videos on pronunciation to date, but more on listening, etc)
https://www.youtube.com/playlist?list=PLiDuxHgWdcgyGRifUg0RaFG6Q1CPG1XrT
Doing English with Julian - long and blah blah but good advice on how to become more fluent
https://www.youtube.com/user/doingenglishDOTcom