A message with any profound meaning is or can be timeless. In that regard, its no less powerful if its said 10 minutes or ten years or 10 centuries ago.
Personally, I'm not into any of these box church preachers or evangelists in general although I see how they fulfill a need in some people. One only hopes the message - and messenger/s - are as earnest and true as are those listening to them.
And if you want to talk canned or repeated messages (tv shows), one ought to tune into EWTN, the Catholic Channel. They have reruns of Mother Angelica that must be at least 25 yrs old, "discussion" programs that have to have been (based on all the brown suits and rust-orange ties) filmed no later than 1977, and even some Bishop Fulton Sheen reruns from the 50s! lol
Its like time has stood still on that channel...and for some reason God thought it was good to stop it pre-Vatican II.
Buutttt...all that said, how old is the Bible? Most people would agree that if it has any merit ever, it still does and always will regardless if its read in 2014 or 2015.
But I do agree that a simple scrawl or text in a corner of the screen stating the original air date would be nice. People like to FEEL connected in the NOW or present so its sort of an emotional bummer to learn that some speaker one discovers or loves has actually been perhaps DEAD, lo, these past 15 years or something.
But in the case of EWTN especially, that message would have to be in the corner of perhaps 80% of all their programming. lol The Vatican or somewhere has to cough up some more cash for new programming that at least mentions or acknowledges the fact that Jimmy Carter was once President. 
