I always have a look but I easily get bored as each presenter tries to find ways to fill in the bit where they are not walking by trying out some task or other as they pass through various places. Sometimes I'm not sure if they ever do any walking? To me the worst one for this (sorry, I know its trains) is Michael Portillo when doing his train rides, he rarely says anything about the train themselves, he's too busy making chocolate, having a dance here or there, playing at being a black smith, etc, its all just padding! As a rule of thumb I prefer YouTube and Vimeo hiking videos, usually a lot more interesting and some film makers can really catch the essence of hiking.