that said, the iPad is not a replacement for a computer.
There are too many differences in the file structure and you cannot access the files on an iPad like you can on a computer.
However; https://discussions.apple.com/thread/7502043 gives an interesting take on what alternative you could use if you want to go forward.
Let us know what you decide.
Been trying to find the answer to this. I have some old DV tapes I will be digitizing so I can edit them. My iPad Pro is only 64 gigs so not a lot of storage for editing media. If I place all the video files on an external drive can I edit the videos without transferring them to my iPad? This is probably a question regarding the new iPad OS coming out as I do not think that full feature is there in iOS 12.