Yes, they show the clip but because they don't name-check the character and because the other dialogue in Moroney alters the plot, they could in effect treat the "Daisies" footage as though it were stock footage. The issue is whether in terms of the script content did "Moroney" end up being a direct sequel to "Daisies" and clearly they went out of the way to make sure nothing internally in "Moroney" matched "Daisies" beyond the fact it was a case of Danno killing a young man who ran from him. Here are some other changes that further come off as deliberate to protect themselves against any potential claim Black might have made if he'd wanted to.

1-Thad Vaughn in "Daisies" was from the mainland in Pennsylvania and had no criminal record in Hawaii and no relatives in Hawaii. Joey Collins in "Moroney" was from Hawaii, his mother lived there and he had a brother who would have been in jail at the time of "Daisies". So not only don't the names match, neither do the backgrounds.

2-Danno is indicted by the Grand Jury in "Daisies" but in "Moroney" notice how he goes out of his way to say the Grand Jury chose not to indict. That comes off as a deliberate line in the script to emphasize he's not talking about the events of "Daisies."

Whether or not these were changes they had to make legally is an open question, but I think it's clear they made them on purpose to cover their bases and pre-empt any possibility of Black objecting. If they'd used the footage from "Daisies" and name-checked "Thad Vaughn" they might have left the door open for Black to make trouble but the footage alone with a name change would not have been enough. Black was paid for the script, not the footage shot.