Discrete Video Modelling as a supplementary ASD therapy - Any experiences or advice?

[yakkiyakkiyogi]

I've recently come across this and found it quite interesting. DS (3.5) is pre-verbal and has a dx of ASD and GDD. He is a very visual learner as also observed by his EP and other professionals and likes watching the same few tv shows repeatedly. In fact the few signs he has picked up are from repeatedly watching a few episodes of Mr Tumble.

I was wondering if anyone has had any experience of using this technique or have heard of it having worked with someone and if it is offered and supported by professionals in UK.