Paa g keday paasay tur pay hoo...?
Anyhow, I have not watched the last video however I have watched some of the points in the video above and I just wanna say this, the term Allahuma is used for invocation and used by Aima e Masoomeen (as).
Also check Quran 5:114 and 3:26
Regarding Salah, bro Salah is an AMANAT, jaise di gaye hai waisey hi adaa karni hai... Duaein karna Salah main achi baat hai but yaar matlab Tashahud aap kaisey badal saktay ho Salah main...? Apka school of thought hai jo marzi karoo... yehi keh sakta hoon.
Hamarey haan toh bhai Jo Tashahud hai wohi rahayga... we are already in conflict with those who are trying to add Tashahud e Salisa in Salah... toh..