Add wrap-up video of model families

[ArturoAmorQ]

Adding an overview of model families was proposed here in the forum.

I understand it is difficult to have focus on all type of modelling methods. Nevertheless I feel that as introduction could be useful to give [an] overview of all model families and their main focus points (for example SVM models, when to use, for what purpose, advantages & drawbacks…

I feel the most suitable way to do this is as a wrap-up video at the end of the course, giving a sensation of summary and closure.