For example, say you wanted to learn how to do a 24 posture taiji form like this:
https://www.youtube.com/watch?v=qV6PjN55Lb4
Find a browser extension that downloads youtube video, download that video.
Then download the VLC player, and use the step frame by frame to pause and take the time you need to learn each posture.
Of course this can't replace in person teaching and correction where you can see movement, posture, and orientation in 3 dimensions instead of 2.
But if you already know the 108 yang taiji form, and you wanted to learn the 24 form from this video, the VLC tool makes it incredibly easy to do so, by studying a 5 minute performance of the form, and not needing to find a 1 or 2 hour tutorial with various camera angles.
VLC (open source video player)
https://www.videolan.org/vlc/
Completely Free - no spyware, no ads and no user tracking. (they take donations)
Runs on all platforms - Windows, Linux, Mac OS X, Unix, iOS, Android ...
Extremely useful windows PC keyboard shortcuts
Press [space bar] to pause and press [space] again to resume video
Press [e] to step frame by frame forward in video (no need to pause video first).
hold down [e] to continuously step through frames, plays at about normal playing speed
There’s no step backward one frame, because of video compression makes this not easy to program.
jump forward and backwards by 3 seconds
[shift + arrow left or right] = move backward or forward by 3 seconds
[alt + arrow left or right] = move backward or forward by 9 seconds
[control + arrow left or right] = move backward or forward by 60 seconds
