The code may be a little hard to implement. Cause in Tumblr you have to know the HTML code yourself. So, it isn't really as easy as people think to code. Here is an example from someone tumblr blog I know.
<script type="text/javascript" src="
http://www.totallylayouts.com/totallyplayer/vintage-music-players/player_v_2.js?id=4503504"
data-config="'playback':{'autostart':'true','shuffle':'true','volume':'50'},'playlist':[{'id':'32150903','player_id':'4503504','title':'Primadonna - Marina and The Diamonds','url':'http:/
http://www.youtube.com/watch?v=Gj5L9SYhoSE'},{'id':'32150904','player_id':'4503504','title':'Bubblegum Bitch - Marina and The Diamonds','url':'http:/
http://www.youtube.com/watch?v=d1eQLw0Nwto'},{'id':'32150905','player_id':'4503504','title':'Britney Spears - Toxic - (Cestladore\\'s Melanie Re','url':'http:/
http://www.youtube.com/watch?v=6JKLFlU7gxo'},{'id':'32150906','player_id':'4503504','title':'Kendrick Lamar - M.A.A.D. City (Feat. MC eiht)','url':'http:/
http://www.youtube.com/watch?v=10yrPDf92hY'},{'id':'32150907','player_id':'4503504','title':'Macklemore - Penis Song (comedy)','url':'http:/
http://www.youtube.com/watch?v=RH76tfDxm7Y'}]" ></script></body>