What is the biim system?

The biim system is a commentary-overlay style inspired by a well-known Japanese watchalong commentary format. It adds timed text and image commentary — plus an avatar mirror of the source stream — in side or bottom panels alongside your synced video, so viewers can follow both the reaction commentary and the main video at once. 

・Helps keep YouTube watchalong archives roughly in sync with Netflix or YouTube

・No account needed — install and start syncing right away

・Data stays local; audio/subtitle preferences can be applied where supported

Get the Chrome extension from the link below!

Chrome WebStore

How to Get Started 

Click the Paste button to paste the time set, then click the Load button.

Other Time Sets 

More timesets are available on our Japanese page. Titles are in Japanese, but the format (title=, service=, url=, start=) is the same — you can use them even if you don't read Japanese. 

You can copy the time set by opening the Japanese version of this page (via the link at the top right) and clicking the green button!

Want English audio or subtitles?

Add these optional lines under any [1], [2]... item: 

This works best on Netflix, where the extension will try to auto-select a matching audio/subtitle track. If the exact track name doesn't match, you may need to switch it manually in the player. 

Enjoy Watchalong Neon! 

Please contact the creator regarding requests, bug reports, etc., using the form below or via X (Twitter) DM!