I’ve never checked on a limit with Splashcast, but I’m guessing 1000 is too much. But even if it wasn’t, throwing 1000 videos into a single “show” is not a good way to expect people to consume them. Instead, I suggest you categorize your videos, create a single Splashcast channel, but with one “show” per category. So all your videos for one category could be watched in sequence.

Basically, few people would want to watch more than 2 or 3 hours of music videos all at once, especially on a computer screen. So keep that in mind when you create each “show” category.