Identify the window and trigger
Check whether the floating picture is the video already playing and whether it appears immediately after changing tabs or minimising the browser. Record the site and Chrome version. A new advertisement window and a Picture-in-Picture view of existing playback are different observations.
For an illustrative example, a viewer who previously allowed the site on every visit may later forget that choice. The repeated transition can then look surprising while still matching a saved preference. Verify the current permission instead of assuming another extension must have taken control.
Adjust the supported permission
Google documents automatic Picture-in-Picture controls in Site settings and in the site-information area. Inspect the relevant site’s state and choose the behaviour you want. Availability can vary with version and site implementation; the newer developer guidance and general help describe somewhat different breadth.
Repeat the same tab switch after the change. Keep manual Picture-in-Picture separate: you may still choose a floating view deliberately even when automatic entry is not wanted. There is no need to remove a working programme account simply to change a presentation preference.
Report a different case if necessary
If the window is unrelated content, collect that separate evidence and investigate the actual source. If the correct programme still floats against the recorded permission, preserve the browser version, site and exact sequence. Avoid clearing all browsing data before inspecting the setting that directly matches the behaviour.
Check that captions and controls remain usable in whichever mode you select. A small always-visible window can help multitasking but may be inappropriate for detailed viewing. This article describes a permission diagnosis, not a universal claim about every Chrome site or an assurance that all unexpected windows are harmless.