Sometimes an attorney should be your first stop on the search for rights.
QandA
Are jokes public domain?
At a certain point, some jokes circulate out in the popular culture enough that I would argue they’re essentially public domain.
To google google
If Kafka ran google.
More camera angles
Reading a screenplay should give you the sense of watching the movie. There are times when it’s appropriate to mention angles, just as it can be necessary to point out costuming, or music, or effects in order to let the reader know what’s what.