Demanding personal information. Most sites will require nothing but the YouTube URL. Numerous pop-ups. Payment requests. The sites should be free. Forced download of programs or converters. While there are programs you can download to get YouTube videos, sites without downloads are much safer. [1] X Research source

Most sites let you input the artists, the name of the video, and any other information you might want to help sort the file when you download it. Change it to your liking, then edit the video quality to fit your desire. The higher the video quality, the bigger the resulting MP4 file.

Some sites require you to click another link after start labeled “Download File. " Again, make sure you’re downloading from the site, not a pop-up. Now that you have the video, it can be viewed whether you are online or not. You can also use iTunes or another media library program to put the MP4 on your phone or mobile device.