[bromix]

Option 1: I wouldn't do that. Why complicate the settings and separate options? This would also mean I should separate the option for the page per items for channels, playlists and so. From my experience as PM and developer I wouldn't do that.
Option 2: what do you mean?! From which list? Search? If so, this is a behavior for RC-user (not PC+Keyboard) so they can easily switch the search to a channel or playlist based search.
Option 3: !?!? I don't understand anything here...sorry. Can you clarify what you mean?

1) I mean the navigation entry "Meine Abos". When you have subscribed to many channels a setting of 50 could be too small to show all new videos. But with a setting of 50 it would load a lot of old videos when I browse through the channels. So I think it would be nice to separate both settings to be able to set a high setting for "Meine Abos" and a low setting for "ABOS".
2) It's also about "Meine Abos". I would like to be able to deselect some subscribed channels for this list as I don't want to have it in this list. For example a channel uploads a high number of NBA highlights each days, so that "Meine Abos" is full of it.
3) I would like to be able to disable navigation entries like "Mein Kanal" or "Liked videos". Or at least to change the list position (for example to set "ABOS" top the top of the list).

I hope it's more clear now.

1) This is more an individual choice of workflow. But sorry no. This is the result based on the APIv2 and same result you get on the webpage. So you have to configure your channels on your YouTube account and not the other way around. With my test account a get old videos too, yes...but that's YouTube and also the result on the webpage.
2) Same here. The result is based on the APIv2 and the same like on the webpage. I won't start filtering default API-behaviors. Especially where start and end such feature requests? I can't even filter channels here, because I don't know the channels at this point, I only call a method of APIv2 to retrieve all uploaded videos of the channels (like on the webpage - the result should be the same). And If so, the request would be slowing down everything because I have to send first a request for all the subscribed channels of the user (think about some one has 200 or more subs. would result in at least 4 requests only for the channels Ids because the APIv3 only support up to 50 results (max)...than where should I provide the filter options?) and after that a request to get all uploaded videos of each channel (again based on APIv3 4 request to get the id of each channels playlist for uploads and again 4 for requests to get the videos. To complicated at the end. So we end up in 12 requests (minimum) only to filter uploaded videos.

3) Yes! I can provide something to disable/don't show settings...the result will also move "ABOS" up, so sorting wouldn't be need here, because this would (like 1-2) complicate the addon at the end for simple tasks.

Please don't be mad at me, but there are thinks I can't agree with (for now), because of usability, development time and performance.