so I don't know how to explain this.. but I keep getting anxieties that the characters in tv series and movies, are real- not just people playing them

using an example:

mufasa's death sceen in the lion king is obviously a really sad sceen

but, everytime I see it, I keep thinking that mufasa is mufasa, he's not... what his name, james someone I think.

everytime I watch a tv series/ movie, I feel so sorry for the people who die, or get injured, what ever- not because I'm enjoying the movie, but because
I'm convinced that those people are those people... not actors and they should have never been their in that situation, because it ends badly for them

make sense?