Help for a technophobe please

getmore4less

what kit do you have, TV ,DVD player smart box,

check what they can use for inputs.

then probably the more important bit do have access to a PC that can do the job and time(quite a lot) and will you need to buy something to store the data

if you need the space the DVD take up there must be a lot.

How often do you watch them is this really going to be worth the effort.

Might be better off with a on demand method.

Another option might be to remove them all from the cases and use a more compact storage method(with index)

have a look at case logic dvd storage.
(you can keep the cases elsewhere)
https://www.caselogic.com/en/gb/products/cd_dvd/albums

the 336 one is Size 32 x 14 x 29 cm.

about the same as a typical bag for life