A very interesting project, advertising now plays a very important role in projects and organizations. it is a pity that did not have time to participate in Pre sale

As i see ICO ongoing right now, but they must had finiched ICO in the end of November. They extented ICO date? And when ICO will be finished now and tokens trading on exchanges?
As I see this project bucked by Okex exchange (at last they written this). Does this means that tokens will be trading at Okex exchange after ICO or no?

The tokensale has been extended until the 26/12/2018.

You are correct, Okex has taken part in the Bidooh tokensale, there has been a lot of coverage on this;
http://www.cryptoninjas.net/2018/10/08/digital-asset-exchange-okex-participates-in-bidoohs-ico/

http://thecoinagetimes.com/index.php/2018/10/08/digital-asset-exchange-okex-participates-in-bidoohs-ico/

https://marcommnews.com/leading-digital-asset-exchange-okex-participates-in-bidoohs-ico/

https://www.businesstelegraph.co.uk/digital-asset-exchange-okex-participates-in-bidoohs-ico/

Take your pick

As for exchange listings, they will be announced after confirmation, which will not be until after tokensale ends and tokens distributed.

I think that the Bidooh project will be successful despite the bear market. The team is actively working and developing its project.

Okex invested money in Bidooh personally or someone from their team invested in Bidooh? So, this does not guarantees that Bidooh tokens will be listed on Okex exchange?
May be they have some official press-relisess about this investing? I just read one sentense from their investment manager (Estrella Du).

ICO Examiner does a story on how Bidooh plans to increase global reach.  Check it out here:  https://icoexaminer.com/press/bidooh-outlines-strategy-to-increase-the-global-reach/

Be sure to join in on the Bidooh Telegram to get the latest news and updates, as well as meet fellow contributors/fans! If you have any questions, it's a great place to ask as well. https://t.me/bidoohio

Indeed 

Do you mean the whitepaper in Russian?

There are currently two other language support available in telegram.
- Korea: https://t.me/bidooh_korea
- Japan: https://t.me/Bidooh_Japan

The hard cap is 25 million, have a look at page 32 of the WP. https://bidooh.io/whitepaper/whitepaper.pdf

Bidooh currently has 16 test screens in the UK and now operates 27 more screens in Bosnia and Herzezegovina, although there is more being installed! Please check out the details here: https://www.warc.com/newsandopinion/news/scfi_billboard_firm_targets_consumers_in_eastern_europe/41218

Don't forget the S Korea deal with 10,000 screens. https://medium.com/@bidooh.io/bidooh-wins-contract-to-roll-out-10-000-screens-across-south-korea-387dc5f5cee