Hi Eduardoooo,
I see that this is a very old thread -- the last post before yours was 4 1/2 years go.
My guess -- and it is just a guess -- is that the video contained material that is no longer valid.
There used to be software that allowed you to analyse the skill level of players at a table before you sat down.
This was OK in the past, as long as the software used only data from your own playing history.
The practice was knows as 'bumhunting" and is pretty much gone from most sites.
So -- how to do this manually:
Take notes, and colour-code the notes so that you can see the level of the players seated that you have experience with.
Find tables with long waiting lists. This usually indicates that there is a person at the table that is playing stupidly repeatedly.
Join a table with a 2-or-3 person waiting list, open the table and while watching, take some notes.
Jump in, play any table with an opening, and if the level of play there isn't to your liking, go elsewhere.
There may other answers.
If no-one provides any better answers within a day or two, perhaps post a new question.
Best of luck,
VS