I know the original broadcast version of Series 6 finale (eps 21 and 22) was 2 episodes together as a “film”, I should have it recorded on vhs and all intro credits are at front, nothing for second half. The vhs release for season 1 episodes 1-6 (https://buffy.fandom.com/wiki/The_Slayer_Pack) I believe has the 90 minute version with no credits on Harvest episode. I also have this series of PAL release (https://www.amazon.co.uk/Buffy-Vampire-Slayer-Complete-Seasons/dp/B005MX6Y6E)
If you have the uncut version of the season 6 finale that’d be fantastic