He's now uploaded another shiny vid, telling all his fans about the film he's involved with. The comments on there alone are very positive, so it's pulled a lot of weight.
Firefly, a sci-fi show with none of the sleek sci-fi look, or any of its aliens, quickly spawned another online community of fans. They called themselves Browncoats, after the show’s rebel heroes. But the series quickly hit turbulence with the network. Fox had ordered a two-hour pilot and then decided it was too long. They stuck Firefly in a Friday timeslot, where shows go to die. They ran the episodes out of sequence, then cancelled the show without airing the final three episodes, but did run the pilot as the finale. Whedon vowed not to work for the Fox network again.
Browncoats were outraged. They tried to save the show, raising money for an ad in Variety, then starting letter-writing campaigns to other networks to pick it up. It didn’t work, but their fervor did lead Fox to release a DVD set of the entire show, with the episodes in the correct order. Sales were fantastic, reaching 200,000 in its first few months. That was enough for Universal Studios to give Whedon the okay to write and direct a Firefly film called Serenity in 2005. The fan-spurred enterprise did pretty well in combined theatrical release and DVD sales, but the numbers weren’t large enough to greenlight a hoped-for sequel.