You are right. Actually there are two yellow/yellowish lights on, one is for sure the ALT, but I can't make the other one, haven't seen a yellow light to the left of the oil pressure gauge before in an R22, unless its his low voltage light that has come on, which would make sence with ALT disengaged or broken ..
Note also the AIS at approx. the same time, 20 sec. in the movie, flying/hovering beside that cow - AIS at approx. 90kts. - well, what the hell, its probably just a blocked pitot tube
..
- madman