I'm looking for two very short mini videos/films.

The first is decades old, perhaps it is still available or there is a
remake.  It shows a map of the world on the screen and each frame
advances the representation of the world?s population at any given
tine by black dots for each estimated 10,000 population.  The time
line is taken back to prehistory and the viewer sees a time line at
the bottom of the screen move as the centuries pass and the dot
groupings grow in number.  And such things as the black plague and the
immigration into North America, first across the Bering Sea and later
across the Atlantic, changes the population.  In just the last few
second the screen goes rapidly almost black as the effect of the
recent world populations are depicted.  The effect was impressive and
lasting and 'd like to have that film to share.

The second is from several years ago and saw on a TV video show. It
ashows a comical piece using the technique of a guy who can memorize a
song backwards and walking backwards.  He is then filmed walking down
the street and jumping into a pool while singing backwards .  The film
is reversed and the guy is seen coming out of the pool and singing
normally but while waking normally and those around him are walking
backwards.

Someone with short film archive expertise ? this should be an easy one!!

This might be your population growth film:

http://listserv.buffalo.edu/cgi-bin/wa?A2=ind9801&L=geodesic&T=0&F=&S=&P=3788

This certainly seems close - but the film I am looking for, I saw in about 1975.

Note that "Our World 2000," the film which I mentioned, was made in 1965.