Vim want to write on a block

I have this file

dvb-apps:
dvb-apps:
dvb-apps:       
dvb-apps:
dvb-apps:
dvb-apps:
dvb-apps:
dvb-apps:
dvb-apps:
dvb-apps:
dvb-apps:
~                                                                                                                                     
~   

I want to enter a description(copy and paste) in a block after dvb-apps: so result like this

dvb-apps:
dvb-apps:
dvb-apps:       
dvb-apps:
dvb-apps:
dvb-apps: Bla bla,description bla bla bla
dvb-apps: Bla bla,description bla bla bla
dvb-apps: Bla bla,description bla bla bla
dvb-apps: Bla bla,description bla bla bla
dvb-apps:
dvb-apps:

If i use the standard paste from console i obtain

dvb-apps: Bla bla,description bla bla bla
Bla bla,description bla bla bla
Bla bla,description bla bla bla
Bla bla,description bla bla bla
dvb-apps:
dvb-apps:
dvb-apps:

How to paste into a block?