How about this calculation?
An average life has:
80 years * 365.25 days * 24 hours * 60 mins * 60 sec = 2,524,608,000 seconds
Recording at a reasonable quality:
@300K per sec = 757,382,400,000,000 bytes = 0.75 pedabytes
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The problem is not the recording or storing of a video of an entire life, but how one would go about searching it. Neither voice nor video recognition is anywhere close to being able to offer a solution to this and that is not going to change in the foreseeable
In practice we will soon have the technology that will provide functionality analogous to a (digital)vcr with one long program of your life. You will be able to replay the events of a particular time but not much else. I expect it will be a pretty boring
program to boot.