Was Webster promoting the rosary like he does now before Lourdes or did he promote it more intensely after? Do you think this pronunciation of latin would render the sacrament invalid? https://www.youtube.com/watch?v=P1G4OnAvtR4
Wow is that bad. This recording didn't have the essential form but at other times he slurred words so badly that it sounded like they were actually skipped. This is incredibly sloppy, lazy, and and irreverent and this man had no business being a Bishop and Cardinal (for this reason alone).
If the pronounciation is so bad that the words are completely unrecognizable or become some other word with a different meaning in the essential form, it would be invalid.
Look at the first sentence. Quam oblationem ... omnibus quaesumus and totally skips the words "tu, Deus, in". If he were to pull that same stunt at the words of consecration, the Mass would not be valid. As for the rest of it, he got every word even it he was slurring his words like a drunk, racing through them, showing no reverence or inflection.