Follow a chess video in 3D. 1: open a chess video in another tab (on YouTube or anywhere else) and play it. 2: come back to this app and click Share a tab, then pick that tab. 3: follow along in 3D: this device reads the board as the video plays; nothing is uploaded.
or

This browser can’t share a tab (phones can’t). Open a video file instead, or use a desktop browser.

Settings
Analyze on Lichess