Ok. I have try it in two ways: as default browser and unset as default. And always when opera is not freeze then it is not to possible to choose other player for http accesed movies.
Today I have uninstal opera then i have install it again. After that operation is a progress: When opera is not set as default then every thing is ok I can view movies. But when I open every link I must select opera as the browser. It's a half solution.
When i setting opera as default it is like before.
IMO still is something wrong with opera becouse opera mini set as default or opera dev works ok.
Thx for help and interest.