you find out that the closed captions in the video are inaccurate.Only the students closest to the computer speakers and those withexceptional hearing capabilities are able to benefit from the video,leaving most of the class feeling more lost than they were before.
I prefer reading the captions whenever I watch videos because I do not always understand the audio, so it would be especially disconcerting if the captions were not accurate. But that aside, I understand the scenario the book is introducing here, and the point about accessibility.
There is layer after layer of things we must consider when embedding an activity into our lesson to ensure all students benefit in a meaningful way. If something goes wrong with technology we need to think of alternate and/or supplemental solutions. But then we must also realize that this is not optimal for a fraction of our students and are therefore tasked with developing further interventions and adjustments. It can be a complicated and time-consuming processes, but it is necessary to create a wholesome learning environment.