What's the deal with this rumba?

Hello (conga) world!
here I am again with a question or two about Cuban rumba - I apologize in advance if this is already getting too monothematic, but, as they say, "la rumba es lo más sublime para el alma divertir".
Anyway, it has to do with this video of a rehearsal of Havana-based modern rumba group Osain del Monte. The amazingly talented musician Alain Pérez is watching and enjoying the rehearsal too.
The first half of the piece is essentially a traditional rumba (yambú, or a slow guagancó?). I think the lyrics are a collage of several popular songs. The second half, however, is something different, and I'm intrigued to know what it is (from 7:00 on). I think it could be one of the "inventos" that are constantly happening as rumba evolves. It sounds timba-influenced to me, with so many breaks and ups-and-downs, but I could be wrong, because I know very little about timba, since it's not really my cup of tea and I haven't listened to it a lot (I prefer "earthier" music -for lack of a better term- like son, changüí, blues and such). Anyway, I happen to like this song a lot, and my questions are the following:
- Is this timba-influenced, or maybe something else?
- Is this style somehow "standard" (does it have a name)? In particular, the parts of the smaller bell (played by the quinto player) and the tumbadoras: are they also played in other situations, or were they arranged ad hoc for this piece?
As always, thanks in advance for your help. By now I see this forum as some kind of oracle that has all the answers, so I'm positive that I will learn something this time too.
Salud!
here I am again with a question or two about Cuban rumba - I apologize in advance if this is already getting too monothematic, but, as they say, "la rumba es lo más sublime para el alma divertir".
Anyway, it has to do with this video of a rehearsal of Havana-based modern rumba group Osain del Monte. The amazingly talented musician Alain Pérez is watching and enjoying the rehearsal too.
The first half of the piece is essentially a traditional rumba (yambú, or a slow guagancó?). I think the lyrics are a collage of several popular songs. The second half, however, is something different, and I'm intrigued to know what it is (from 7:00 on). I think it could be one of the "inventos" that are constantly happening as rumba evolves. It sounds timba-influenced to me, with so many breaks and ups-and-downs, but I could be wrong, because I know very little about timba, since it's not really my cup of tea and I haven't listened to it a lot (I prefer "earthier" music -for lack of a better term- like son, changüí, blues and such). Anyway, I happen to like this song a lot, and my questions are the following:
- Is this timba-influenced, or maybe something else?
- Is this style somehow "standard" (does it have a name)? In particular, the parts of the smaller bell (played by the quinto player) and the tumbadoras: are they also played in other situations, or were they arranged ad hoc for this piece?
As always, thanks in advance for your help. By now I see this forum as some kind of oracle that has all the answers, so I'm positive that I will learn something this time too.

Salud!