It seems this set of credits are affected by these issues much more than the others - perhaps the choice of background image wasn’t ideal and added to the VHS/YouTube conversion problems.
When you see the plane crash episode, some bits seem a bit laughable, like Archie getting blown up and the slow moving flame going towards Joe Sugden's land rover, but then they wouldn't have had the biggest budget to do it, nor modern computer effects to make up for the fact you couldn't crash a real plane, or blow up and demolish half of Esholt, both of which they could do now (well, not blowing up Esholt, but as they have their own set they can destroy it in a way you can't a real village).
A little bit behind the scenes of the plane crash here, uploaded by someone who was contracted by YTV to create the impression of a demolished Demdyke Row. It’s worth reading the description that accompanies the video.
I think it was one of the most expensive TV “stunts” at the time, but I can see how they were limited without today’s CGI etc.
They also either weren’t allowed to, or chose not to show any bodies from the plane - I expect the early evening time slot had something to do with that, and also the fact that the storyline was about how the tragedy affected the villagers. Information about the aircraft and the cause of the crash were very vague - a radio report was heard playing in the background of one scene, stating a wide bodied aircraft en route to Canada from Eastern Europe had crashed from 30000ft killing all 250 passengers and crew. (In the end, the death toll was 259, including nine residents of Beckindale). Despite the obvious similarity to the Lockerbie disaster, that event was referenced only once in the episodes, where Bernard McAllister stated that emergency planning had came on a long way since Hillsborough, Zeebrugge and Lockerbie. I expect YTV wanted to downplay any suggestion the storyline was based on the Lockerbie.
Cut out the coupon in your TV Times!