Enable the emvideo module.
Extract the module to sites/all/modules or sites/xxx/modules depending on your configuration.
Enable the module at admin/build/modules or using drush.
Edit your content types to add an emvideo field as desired.
Choose myvi.ru in the providers list.
Create new content of the appropriate type.
Copy the url from your desired myvi.ru video and paste into the relevant field of your new content type.
Please note that the embed/object code does not work as there is no xml or json api with myvi.ru so fetching thumbnails and images relies on fetching and parsing the raw html of the pasted url.
For more information on the emvideo module refer to the Embedded media field Module.