The man in the video argues that if most life forms we know today originated from a bacteria then that bacteria would have experience a gain of information to create things that are not present in the bacteria DNA information.
If the man in the video argues that. Then the man in the video doesn't understand evolution and natural selection.
When chromosomes from two donors are combined during fertilization ... the replication isn't always 100% representative of both.
Errors in the DNA coding can creep into the code. Most times these errors are benign. Sometimes, they are deadly, and sometimes, they result in a slight change to the organism that may help it survive better in its environment.
This isn't a gain or a loss of information, just a change.
If that genetic mutation is beneficial, the organism will thrive and pass that mutation on to more of its offspring.
Things like eyes, ears, and other components of complex organisms don't suddenly appear. They are the product of millions of genetic mutations, compounded over millions of generations to create new creatures.