Best practice to save HTML5/Flash web videos on Win, Mac, web... platforms?

[colorstar]

Full title: What are the best practices to save most HTML5/Flash web videos on popular, major platforms, including Windows, Mac, Linux, and some sort of web based solution, compatible with iPads and Chromebooks as well?

I like GUI, web based things more than the command line.

Questions:

- Sometimes I need the video for the full video content, sometimes I need the video only to extract the audio from it.

- Speaking of audio, if a video (say, on YouTube or Vimeo) is available with 1080, 720, 480 and 360 resolution as well, and I only need to extract the best audio file from it, should I always go the 1080 version, or sometimes the 720, or even the 480 video will suffice?

- Speaking of video, even though for extracting the best audio, I may (or may not, see above), always need the 1080 video file, if on the other hand I want to grab the video for video watching, I will not always go for the 1080 version, more often I go for the 720, or sometimes even for the 480 version (if the picture is not so important, just say, there are a few slides in a lecture) because of space and maybe battery constraints (I guess, playing back smaller video files allow for more battery juice on mobile devices, but I may be wrong).

I tried

- en.savefrom.net
Pro: cross platform (it's a website)
Pro: it certainly does not require Flash to be installed on my computer
Con: because of it's business model, it usually offers 1080 YouTube videos without audio. On the other hand, Vimeo 1080 videos you can get with the audio embedded.
I don't know if it's a pro or a con, but it offers one, separate audio download for YouTube videos (I'm honestly not sure if it's extracted from the 1080, 720, best, or just good enough video), it does not offer an audio download for Vimeo videos, I have to use a separate audio extractor (for the moment I use the Pazera Free Audio Extractor).

- FlashGot add-on for Firefox
Pro: it is also at least partially cross platform, as it runs in a browser, a FireFox browser which supports add ons, on any system the browser runs on
Con: not sure if it's a con for en.savefrom.net or for the FlashGot add-on, but with Vimeo videos, I usually get the exact same file sizes, bit-by-bit, with both methods. From YouTube videos, it's different. First of all, FlashGot finds, usually 2 separate 1080 .mp4 videos, 2 separate 720 .webm videos, etc. with different file sizes (to add to the confusion). If it finds both, sometimes it does not list all the available downloads in the drop down box, I have to reload the page, it's a messy experience anyways.
Flash: I don't remember when was the last time I had to install Flash on my computer just to download a video through Firefox with FlashGot, thankfully, flash-only videos seem to be dying out.

The bottom line is, I'd just like to have a neat and easy workflow (on Windows, Mac, Linux, web, or something for iPad and Chromebook) for painlessly be able to download today's most popular web videos, including from YouTube, Vimeo, news sites, in case different quality versions are available to optimize separately, depending if I need the audio portion or the full video. Thanks!

[dellsam34]

Try this:
https://www.4kdownload.com/products/product-videodownloader

[colorstar]

Try this:
https://www.4kdownload.com/products/product-videodownloader

Interesting adware/shareware/donationware(?) whatever program, thanks! Is it based on 'YouTube-DL'?

It might be good for downloading videos (until I find a truly freeware/free software, open source version), but I tried the audio extraction feature and it confused me! From the same Vimeo video, the Pazera extractor extracted a bigger file, when both software set to extract the original audio.