There are lots of seaplane videos on the Web. Here's one that runs mostly in real time--an hour of Jim the Pilot flying a Beaver on amphibious floats, with an interesting bit about his nav and rescue devices beginning at 35:50.
An hour of video is a lot to expect someone to watch, especially when most of it is waiting for something to happen--waiting for the oil to warm up, for arrival at a destination, and so on. But in this case, that long hour is the strength of the video because you really get the effect of riding along in the right seat. (I confess to skipping ahead a few times.) If you're still game by the end, there's a half hour of Part 2 that will probably start up automatically.
In any case, it reminds me of why I really enjoy flying my Searey--because it's a relatively simple airplane that starts up simply, takes off simply, cruises simply, lands simply, etc. No primer, no wobble pump. A Beaver is a solid airplane, much larger than a Searey and faster, but it's certainly not simpler! (Jim's Beaver is simpler than the L-20 Beavers the US army had when I was a G.I. in Korea. They often used the hand-cranked inertial starter and needed a pilot with three or four hands, especially in cold weather.)