The other 2 videos in the sequence cover that. If you can't get the sweep from the first video, you can usually a tweak uke's knee and create enough space to duck under the seatbelt and land in outside ashi.

Or if he attempts to step-over to take the back and doesn't keep the hands clasped 110% You can still make this work:

Video three covers how you can use this to set up the back-door escape. When Uke tries to counter your hook.

Obviously no escape works 100% of the time, and it's better to not get passed in the first place haha.