To find and view videos that you've downloaded on your Android device,Sign in to your Premium account from the YouTube App.Tap your profile picture.Select Downloads from the list of options.
Source : https://support.google.com/youtube/answer/11977233?hl=en&co=GENIE.Platform%3DAndroid
Ctrl+J: View recently downloaded files.
Source : https://edu.gcfglobal.org/en/windowsbasics/keyboard-shortcuts-in-windows/1/
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Source : https://www.youtube.com/watch?v=8B-vTnySQig
This error means that your computer's security settings blocked the file. Learn more about blocked downloads. On Windows: Windows Attachment Manager could have removed the file you tried to download. To check which files you can download or why your file was blocked, check your Windows internet security settings.
Source : https://support.google.com/chrome/answer/2898334?hl=en
You can also right-click on the file and choose Save as. Images: Right-click on the image and choose Save Image As. Videos: Point to the video. Click Download .
Source : https://support.google.com/chrome/answer/95759?hl=en&co=GENIE.Platform%3DDesktop
On your Android phone or tablet, open the Chrome app .At the top right, tap More. Downloads. If your address bar is at the bottom, swipe up on the address bar. Tap Downloads .Next to the file that's downloading, tap Pause or Cancel .
Source : https://support.google.com/chrome/answer/95759?hl=en&co=GENIE.Platform%3DAndroid