Most of the Yandex developers are not that good or not loyal to a company. This classes in universities is a scam: instead of teaching people of real world things, they teach how to work with yandex tech stack.
Yandex lost almost all good developers and it is continue even further. Companies rent offices near yandex and find yandex developers in the restaurants around this buildings and convince them to leave. This is very easy to make a decision to leave yandex for them.
Once i came to talk to yandex and ask - why they don't make good experience for mobile apps in their search results? Why they are not indexing anything related to apps? Answer was simple - user then will use this apps instead of yandex.
And such toxic ideas are pretty common in the company.
Talking about maps - they pushed out of the market one of the most awesome maps application in the russia. It had crappy UI, but it always make correct estimates and was able to learn your behaviour (more than 5 years ago!). While their app doesn't work at all but it couldn't because they need real drivers to make sane navigation. Then they pushed it to a taxis with a very simple trick - for taxis they made routes LONGER than it should be. This got them big fleet of a taxis. (sorry no proofs, but they are on russian and you won't understand it anyway)
I hope they won't be that successful with their crappy product on the roads (they failed in almost everything in last years) and it will be much harder to compete for smaller teams as everyone will say "huh, but there are yandex guys already!".
This video is a too dumb for a year of work. Voyage are better already, but they are a small team unlike yandex. Geohotz was even faster.