What is the fine-grained topic of the following text: Vidopp.com is one of the best amalgamators and conglomoratrixes of the internet video contest world, and I have been in touch with them for a long time, frequently sending contests their way when they have slipped through the cracks to pass them on to the rest of the world. Only return the topic.
Vidopp.com's role in the internet video contest world