Hi, I'm Ashik. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP
Weblocs are shortcuts to websites. That means the videos are not downloaded to your Mac, instead you just made a shortcut on your Mac to those videos websites. How exactly did you save them to your Mac ?
Hi, That won't work because what you copied to flash drive was just a shortcut to the video website. You need to actually download the videos to your Mac.
Most of the videos from well known websites (like Youtube) can be downloaded to your Mac using this website --> www.savefrom.net
Can you tell me from which website are you trying to download the videos from ?
Can you download those videos using this website --> www.savefrom.net
Go to www.savefrom.net
Paste the link of website in Savefrom.net and it will load the video. Click Next arrow button and this will load different version of Quality of video. Right click on quality you want and click Save link as and this will allow you to download teh videos