Not working with Youtube

Downloaded and installed "HD Download" went to "coolmathgames" tried to download a swf game file. It failed. What more do you need to know?

doesn't work with youtube

I push play on video -> "Hmm, no video detected." Fail.

Does not work for YT it only says "Hmmm... No videos or flash files here..."

Doesn't "see" video in Youtube!

can't find any video

This is garbage, does not work at all.

一度もダウンロードできたことがない

Doesn't work even on YT, but wants all of your data and permissions. Sus af.

Read the reviews, figured I'd give it a try. Reviews weren't wrong, it just doesn't work. Useless crapware.