You can't just let out the incremental ID and make sure your save method, when it's a new entry, generates an ID from your preference?

public $incrementing = false; on your model indicates the ids are not auto-incrementing.

In fact am looking to generate some random ID like Youtube.. Something like this: ggPo8mbb_dep and not use the simple numeric ID

Maybe it will be helpful => http://hashids.org/php/ It creates YT-like IDs from number ID.

As lukasz mentioned, hashids are probably what you are looking for.

The problem is I have to rewrite the find method and some other method that give the ID... I wonder if there is a package or if someone already did it ?