Someone is playing a video and I overhear something and I think that they're watching something inappropriate but actually they are watching something else.

Can I say
I took it out of context. ?

Question

Someone is playing a video and I overhear something and I think that they're watching something inappropriate but actually they are watching something else.

Can I say 
I took it out of context. ?

Answer

Yes. Or' I got the wrong end of the stick'. 'I misunderstood.' etc.