How can I create a list of video-nodes that belong to a particular category. The videos are provided by various video plugins (Youtube-Node, Plyr.-plugin , Wistia plugin).
What exactly do you want to achive?
Creating a list of teasers or links for some nodetypes is not a big deal. To help you it would be good to know what kind of data/nodes you have and what you really want to select with FlowQuery.