The first video is of a boy talking with his brother and sister (they're triplets!) at dinner (using a Springboard Lite from PRC). I remember first seeing this video and loving it---it was one of the first times I saw AAC included in home life like it was no big deal. Also, you kind of can't help but laugh at the typical kid talk :)
The second video is the movie "Only God Could Hear Me." This documentary follows the lives of four adult AAC users and simultaneously tells the story of the creation of the Minspeak AAC language. The opening scene of this movie totally blew me away, simultaneously revealing and destroying assumptions that I was unaware I had about people who use AAC. Chris Klein, who is featured in that opening scene (and throughout the movie) is now the president of USSAAC, the United States Society for Augmentative and Alternative Communication. If you don't have time for more, at least watch the first four minutes and twelve seconds.