Well, let’s say you are taken by some group and they use duck tape or zip ties which is common for large groups of people. The idea is your captors won’t be watching you all the time, and this video shows how to get out of them if put in front of you. I have not tried this yet, and I would suggest you do so rather than trust just watching the video:
If your hands are behind you:
How to get out of handcuffs without a key (Note you need a bobby pin)
If you liked the last one there are 3 other sections you can look up. I found the information interesting.