A read receipt isn't proof anyone learned anything. A correct quiz answer is.
OSHA's own training standards require that safety training be presented in a language and vocabulary employees can understand -- but understandable and understood aren't the same thing, and most programs only ever check for the first one.
What "they watched it" doesn't tell you
OSHA's own training standard
Training "must be presented in a language and vocabulary that employees can understand"
[OSHA Training Standards Policy Statement]What most safety talk programs actually verify
That a video played or a text was opened -- not that anything in it was understood
The well-documented "testing effect"
Being briefly tested on new information produces far stronger long-term retention than passively reviewing it again
[Test-Enhanced Learning (Roediger & Agarwal, 2011)]"Did they watch it" and "did they get it" are two different questions, and most compliance tools only ever answer the first one. A worker can tap through a video at the end of a long shift and confirm attendance without retaining a single thing from it -- and nothing about that shows up in a completion report.
Every Safety Talk TV send ends with one short comprehension question, answered right on the same link a worker already taps to confirm attendance -- graded instantly, in whatever language the worker was shown the talk in. Your Compliance page tracks quiz accuracy right alongside completion rate, so a crew that's confirming talks but missing the comprehension question stands out instead of blending into a 100% completion number.