kings indian book or DVD interest

These 2 are not Black specific (they are not White Repertoires either), though the latter has a slight black bias only because more than half the games the author is Black:

Opening Simulator - Kings Indian Defense (in essence, this is a problems book where every position came from a Kings Indian Defense)

Kings Indian Warfare

For a little bit of an easier work, and possibly a precursor to the other 2, would be The Kings Indian Defense Move by Move, by Sam Collins, and that one is definitely a repertoire for Black.

If you want ot buy a genuine kings indian course 

Then lifetime repetoire on kings indian defence by gm gawain Jones is awesome and the best book to refer all the theory and ideas in kid and gm gawain Jones is the most experienced kid player as he is the only 2600+ who used the kid in daily tournament  so you can't find more experienced kid author

I would suggest this one:

https://www.chess.com/article/view/quotunderstanding-the-kings-indianquot-by-mikhail-golubev

Smirin's King's Indian Warfare which @ThrillerFan mentioned is a brilliant book, but the target audience is advanced players.

What is  your opinion on gm gawain Jones kid chessable coirse

Same as Kotronia's multivolume work on Quality Chess: Way too detailed (more than 1800 trainable lines are too many, and personally I do not like Chessable's traning method) and computer depended for class players.

They might be great for advanced players with previous experience in the KID ideas, but not very good for understanding.

Ya u can say that the course is good for player 1500 or 1800+ who have previous on kid if you r starting out kid then you need a lot of experience about kid which you can get by playing it a after you get to advance level one level before expert and two levels before master then you can think up of courses like that

 Even magnus  wont remember this much variation if he had to play kid against top super gm 

This is impossible to remember 1800 trainable variation and then remember at least 6000 variations if you have a reperoire 5-6 openings which is required as you need 3-4 openings for black only 

That's why I suggest people under 1800 otb chessable short and sweet is more than enough and also free