this one is not really indie or alt but it is chill https://www.youtube.com/watch?v=B383PElQMHo&list=RDMM&index=3
also this https://www.youtube.com/watch?v=HSDdRxAEdcs&list=RDcxVAT_pdyOA&index=11
and this https://www.youtube.com/watch?v=o7fgFaXKVa0