I've tried a fair amount of online stuff, unfortunately it never it comes close to the quality of attending a course in person.
I've just stopped my
KelbyOne account because I find the lack of quality shocking (based mostly on software lessons, rather than photographic ones for now)
Sometimes I pick up photoshop stuff from
Phlearn website which are strange, funny and good to learn from.
Karl Taylor does some good DVD's
uDemy does some stuff to although I've not used them for photography yet (only IT stuff)
But big events like
GPP,
Fstoppers Workshop, and local stuff from studios in your city are so much more worth while as you not only learn, but you meet people, as they say "networking" (an adults word for socialising) is invaluable. Here you find the opportunity to meet someone to be a shooting buddy, or maybe a mentor which will encourage you to get away from your computer screen and out shooting.
The problem I guess I find with most of these monthly sub sites like KelbyOne, is that all that same material is available free already. There are so many BTS videos to learn from, youtube, vimeo, info sites like Fstoppers and SLRlounge, it just isn't worth paying the monthly sub. KelbyOne isn't even organised well, with so many out of date videos in the way of your searches.