1. Men, as a group, have always preferred the company of other men. This is nothing new and should probably be viewed as the default behavior.
2. The internet and all other late 20th/early 21st century technologies have altered the minds of females, too. This speaker is taking a very narrow view of the issue by focusing only on the changes in males.
3. The feminist movement has changed the role of males in society, the result being that many males do not know where they fit in because the male gender role is no longer clearly defined.