Arduino ide dont recognise digispark

Hello! Im new with those things, and i dont with what is the problem. I downloaded arduino, putted in Additional Boards Manager: http://digistump.com/package_digistump_index.json , selected 16.5mhz board, clicking upload, and putting my digispark. First 5 seconds green light, and then red lights blicking. But arduino does not see it. This is my digispark: https://www.amazon.nl/gp/product/B076KS2QDS?ref=ppx_pt2_dt_b_prod_image . Did i do something wrong?(sry for my bad english)

Upd. Guys i just didnt had drivers on my pc, no problems

UNPLUG the board then hit UPLOAD on the IDE.
You will see a message to plug in the board and do so at that time.

The ATTINY boards have a very small bootloader that will usually only work when you plug them in as mentioned above for a short period as you noted by the LED status.
This is especially true for most of the ATTINY boards unless the bootloader has been modified.

see last half of this youtube video