When you make a selection on the pages and red links appear, if you click on them, you will be presented with videos that contain that expression.
In those videos you have controls that allow you
go back for a few seconds,
repeat it,
pause it and
play it. As well as
move to another video or
return to the previous one.
You can write the box that says "Search for ..." and press the button
Watch a video with the expression you write there. Use quotes to make sure it is the expression you want.
Using the buttons:
You can select the accent that interests you.