Among this list CC0 is the best license type where you would not have any restriction whatsoever.
CC-BY means that you are expected to mention the source of video and give due credit to the author or the website. Other have a sweet mix of different licenses for different videos.
Mostly Free
Coverr CC0Life of Vids CC0
Mazwai CC-BY
Pexels CC0
Pixabay CC0
Cute Stock Footage Free with custom License
Stock footage for Free Some are Free
Videezy CC-BY
Videvo CC3
Beach Front b-roll CC-BY
Vids Play CC-BY
Free HD Footage License info missing
X Stock Video Free
for non-commercial use & cheap for commercial use
Occasional Free Clips
Dissolve Some
are free
Wedistill Some
are free