I'm now recording Skype classes so, for example, a couple of people couldn't make the Monday night time slot, BUT they can just watch it at their convenience (it's saved in skype for only 30 days AND it's in our private chat on there so no one else has access).
BUT there's another benefit... people can watch AGAIN and this is good for TWO reasons:
First, people often think they are doing something they're not or that they are looking one way or another and they're not or that they are doing something "wrong" (a word not used in my classes but still...people think it). But now they can watch and see!!
Second, because the work is rather introverted in nature (a lot of people work with eyes closed), now they can go back and watch what other people were up to. This is important -- our bodies take this stuff in and the next time they move, they'll have integrated something new.