Why is my webcam streaming in "compatibility mode"?
Most likely, it is because you have a webcam that is not compatible with the "advanced mode".
The "advanced mode" is efficient in CPU usage, and hence able to stream at full speed - 25 frames per second. However, not all webcams are compatible with this mode.
By default, TSD plugin tries to stream in advanced mode first. When it fails because of an incompatible webcam, it'll switch to "compatibility mode". This streaming mode is compatible with virtually any webcam. The main downside of the compatibility mode is it uses significantly more CPU than the advanced mode.