A small web-app that may be useful when analyzing or practicing with Youtube videos and offline media files:

https://agrahn.gitlab.io/ABLoopPlayer

It has A-B repeat, fast/slow motion and loop bookmarking facilities.

Some more features:

• The A-B loop window can be adjusted using a double-handled slider, ← & → on the keyboard, or, more accurately, via two time input fields.
• The entire A-B loop window can be moved pressing Ctrl and moving one of the slider handles.
• A-B loops can be saved as bookmarks for the current or for later sessions on the same computer and in the same browser.
• Bookmarked A-B loops can be annotated individually with short description texts.
• playback rates from slow to fast motion
• resizable video display
• search videos on YouTube

If the player widget has the focus (after clicking on it) it can be controlled with the same keyboard keys as the player on the main YT web site, e. g. ,, . for seeking frame-wise

A small web-app that may be useful when analyzing or practicing with YouTube videos and offline media files (I am its author):

https://agrahn.gitlab.io/ABLoopPlayer

It has A-B repeat, fast/slow motion and loop bookmarking facilities.

Some more features:

• The A-B loop window can be adjusted using a double-handled slider, ← & → on the keyboard, or, more accurately, via two time input fields.
• The entire A-B loop window can be moved pressing Ctrl and moving one of the slider handles.
• A-B loops can be saved as bookmarks for the current or for later sessions on the same computer and in the same browser.
• Bookmarked A-B loops can be annotated individually with short description texts.
• playback rates from slow to fast motion
• resizable video display
• search videos on YouTube

If the player widget has the focus (after clicking on it) it can be controlled with the same keyboard keys as the player on the main YT web site, e. g. ,, . for seeking frame-wise