While I am not a fan of colourisation and other enhancements, I must say recent software advancements do help to make original footage come alive.
Here is an example: the DruidWorks YouTube channel uses software to enhance original wartime footage. The link below show a few clips of aircraft crashing on carrier decks, or dropping off into the water… The enhanced colour and sounds surely help to make the original footage more realistic and reminds us of how dangerous carrier operations were.
https://youtu.be/XeLh-9JDWoM