I've been trying to understand the differences in the pre 1955 Holy Week liturgies and the 1962 version. I've listened to lectures and read a few explanations but seeing it was the key for me.
I found a pre-1955 Palm Sunday Mass and watched then compared it to a 1962 rubric Palm Sunday Mass and then the Novus Ordo.
I was watching a video on traditional texts to study for Holy Week and one of the resources was Restore the 54. It does a good job spelling out the changes that happened during the Pius XIII pontificate to the Holy Week liturgies.