1/3 Pull the progress bar. The progress bar of some online courses can be pulled, and there will be no record, so it is not considered. Just fill the progress bar. This is a small part, and most of the progress bars can't be pulled out, otherwise the teacher will tell you that you can't pull the progress bar. )

2/3 times the speed, in this era of efficiency, the vast majority of online courses will have twice the speed, directly open to the highest, usually 2 or 3 times, and the efficiency will come out.

Honestly, two thirds. If none of the above works, then play the video honestly. However, you can choose to mute it and play it while walking or in class, which will not delay other things.