When Daniel first started making Troll Bridge, there was *no* Discworld live action tv/movies at all, and he wanted to be the first. They got Terry's approval, shot some of it (a prequel bit) and looked for investment from film grant bodies to get the rest. Noone was interested. By 2009, when Hogfather was being made, they knew that they'd never be the first (considering a professional company - The Mob - would manage that feat) so instead decided to make it /as good/ as a professional film, but done for a much lower budget. The existing prequel bit was scrapped and replaced with a full on 'war' prequel, and progress continued, albeit slowly (considering the "no money" factor). The main story with Cohen on the bridge *was* shot on location but it would have required a huge amount of post production to make it work. So even that footage was scrapped. In 2011 at Nullus Anxietas III, they launched the Kickstarter - for crowdfunding was only just making inroads into the public consciousness at that point - and that is where the money to make the film came from. They asked for $45000, and got $82000, which is a miniscule budget for any film in the modern era. Using that, they've shot some location scenes in New Zealand, and re-shot the main part of the story on a custom-built set in Melbourne with green screen backgrounds. It's been a long time, but they'll make it - it's in the final stages now (the post-production animation stuff) and although it seems any specified deadlines just go whooshing past, remember that /EVERYONE/ working on this project is not getting paid nor are they allowed to sell copies of the film afterwards (both part of the original agreement with Terry), so any of these film makers (directors, editors, special effects artists) who get paid work will give that work priority as it's how they can afford to eat and pay rent. Troll Bridge is a labour of love.
You might get a chance to see it - but you won't get a chance to /own/ it without backing the project.
In the mean time, Snowgum films have made about half a dozen other short films, and had a few paid gigs making advertisements or music videos. Check their website for all of these. I heartily recommend "Run Rincewind Run", "Undead Ted", and "Blood on the Game Dice".