hi !
J'aime étudier le français = j'aime l'étudier
Jean et Jacques aiment regarder le football américain =
Jean et Jacques aiment le regarder
OR (if you had to put a contraction)
Jean et Jacques aiment le football américain
Jean et Jacques l'aiment
you must contract "me, te, le" when a vowel follows +y+H.....
Look at the two answers below I already answered specially the one asking if direct object take place of.................
Hope I helped !