All floaters must watch this introduction to Floating before floating the first time.

This is a very famous video on floating with Joe Rogan.
Here is a great documentary on floating. Took a few years to make and is very very good.
Sensory Deprivation Tank Improves Sports Performance & Learning
Former UFC Champion Jens Pulver's First Float Tank Experience at Sydney Float Centre
The 'Basics of Floating' by Theta State Float Center (Original)
NBA's Golden State Warriors Stephen Curry and Harrison Barnes talk about floating and its benefits for them during the season.