A wee FR24 linky trick
If you take the basic sharing-URL like
http://fr24.com/BCS2883/5cb2ead
and insert the date, time and playback speed ahead of the callsign
http://fr24.com/2015-03-19/21:00/12x/BCS2883/5cb2ead
Then it opens the flight in playback mode from that time and people can review it for 28 days, instead of the basic link vanishing when the aircraft lands.
It's the same way the links are built within playback mode but quicker to make.