Having a strong password is important, too. Make sure to use a mix of numbers, punctuation, and letters in both uppercase and lowercase—or a nice, long passphrase. Don’t use the same password (or even a similar one) for multiple accounts, either. Ideally, you should also change your password every few months to stay on the safe side, and invest in a good password manager to keep yourself as secure as possible.
If you want to download as videos itself, you can use other free tools like Free Youtube Download to download all videos with a single click. Please be careful while installing this tool as it optionally installs a browser toolbar and modifies search preferences. So please make sure you read and uncheck the optional checkboxes while installing to avoid surprises in your browser. 
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Keeping your account protected may also require a little common sense on your part. Keep an eye out for phishing emails pretending to be from Google asking for your account info, and if you ever find yourself redirected to a random login page check the URL to make sure it’s not a fake page. Two-step verification will protect you from these types of scams most of the time, but you should still try to avoid them.
Step 3. Next, the program will start parsing the link. If the number of videos in this channel or playlist is more than one hundred, the software will automatically download all videos (in the highest quality by default) after parsing; if there are less than one hundred videos, a window will pop up. At this time, you can select video resolution, whether to download subtitles and video cover, or convert all videos to MP3 audio, etc. After confirming, press the download button.
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