Here is fast temporary solution
1. Install TOR proxy client: "apt-get install tor tor-geoipdb privoxy"
2. To connect
bigbluebutton.org server use command with "torify" prefix. For example, "torify wget
https://ubuntu.bigbluebutton.org/repo/bigbluebutton.asc -O- | sudo apt-key add -". Also u should use "torify apt-get update" command instead "apt-get update"
3. To install bbb package first dowload it to the cash with TOR "torify apt-get install --download-only bigbluebutton" and then "apt-get install bigbluebutton"