I'd respond that you want as much as possible! I won't be able to offer you any form of realistic answer based on the german market... Without speaking numbers, you usually have your ONDEMAND channels (hotel network, VOD TV) and would negotiate a fair profit exchange/royalty/commission of at least 20% or more depending on the complexity of bringing your material to a broadcast level on TV (film boards, editing, approvals, fees).
For outright sale of content useage, be very cautious of the terms of how this content is used - most importantly a length of contract to be sure at some point it ends and your material isn't used as filler - foreverrrrrrrrr.
I'd be glad to speak of our experiences and wish you well.