Hi, this could be a feedback but please bear in mind it may be very opinionated. I checked with several colleagues and none of them are comfortable with the pronunciation of the word 'data'. For me it is a very distracting part of the videos and I decided to turn off the audio due to that...

I did of course look it up and the pronunciation can be:
1. 'Big day-tah'
2. 'Big dad-ah'

Both are correct. The second one is however very uncommon and can be experienced as very distracting (in my opinion). I am writing this feedback to you now because I read that I only get one chance at the test to get the certificate - so I am a bit worried my test results will be affected.

I don't expect any changes because you have a LOOOT of videos with this pronunciation and it is probably not worth your time, but I just wanted to point this out! Maybe there are others who will react too! Still, I will have to try my best to not get distracted. Don't take it the wrong way: the content itself is great!