are all old films on dvd /blue ray now the original film as it was or have...

[medievalfolkloreEra]

...they all been re-edited? im 35 and i dont like any modern films of this era, im into old films from the 60s, 50s, 70s and 80s......but with all the things movie company's do to films now like - remaster , digitally re-edit , add cgi effects etc

are old films transferred to blue ray and dvd now the original film without any tampering or are they a re-edited version filled with re-edits and cgi effects ?