We'ge only got Freeview and BBC Alba is on that - though we are in Scotland. May be different elsewhere. It is on BBC I-Player though. Just look under the music section of the catch up list and there are various BBC Alba programmes on that and it is one of the stations listed so presumably can be also watched live.

The station does get far more viewers than there are Gaelic speakers though supposedly football viewers (probably mostly with the sound down) make up a significant percentage of that. It has good music programmes though and actually some interesting factual (ie history etc)shows too.