It’s actually depending on the Storage,Processor,Battery Life,Resolution/Graphics that you need .But I will suggest you some of the devices i have used for video editing.
Samsung Galaxy Tab S4
Snapdragon 835 is the processor of this incredible device and it runs with 4GB RAM and so comfortable.
Microsoft Surface Pro 6
This lightweight tablet allows you to continue your editing with enough storage and all-day battery life. It allows working already with 1TB.
Apple iPad Pro
A highly powered processor(A12X Bionic chip) gives ability to you to do a task quickly. It includes four speakers very supportive to manage audio and, storage also plentiful