The connections themselves are only as secure as your connection setup. It's your job to use a vpn or set up tor for all your traffic, if you feel the need to do something like that for youtube feeds and streams. Since this only handles feeds, and watching or downloading the streams themselves is done with another program, presumably you already have your preferred security measures set up for that other program, so route this one through the same setup. For adding extra fluff to the request headers to hide in the crowd you can use GetFeed.get_headers. The default request looks like this:
GET /feeds/videos.xml?channel_id=... HTTP/1.1
and the equivalent for invidio instances.