It depends for what your looking for,
For education: Snake discovery (my top), Will Nace
For fun and education: Catch it, Chandlers Wildlife
For field Herping: I recommend LouB747 he makes a bunch of videos around the world and has found Kraits king cobras...!!!, Also Brave Wilderness though they have videos of al types of animals.
(And you can check mine out
![Yes](images/smilies/yes.gif)
(Herping Worldwide) which focuses on education)