TLDW; No
Basically the video is testing phones with varying charging speeds and how much battery degrades after 500 charging cycles. Also, the affects on performance after battery degradation at 5:37
Timestamps of some tests:
- Test results for different charging speeds at 3:06
- Storing batteries at 1%, 50%, 100% at 3:43
- Battery performance at 4:42
After 6 mins he talks about why the tests took 2yrs and how they did it 3 times.
The message is correct as modern phones are able to take care of their batteries.
The experiments themselves were very flawed.