Some good reasons for always using Welch's T-Test (t-test assuming unequal variance). I mentioned in the video that it's very unlikely that your variances will ever be equal, so just do unequal variance aka Welch's T-test. But don't just listen to me:

• https://digitalcommons.wayne.edu/cgi/viewcontent.cgi?article=1314&context=jmasm
• https://stats.stackexchange.com/questions/313471/always-use-welch-t-test-unequal-variances-t-test-instead-of-student-t-or-mann
• https://doi.org/10.1093/beheco/ark016