Video playback in GTK

I am using Wayland/Weston with GTK and trying to write a Python script to display video on the screen. I have a GTK window with a grid and I just add the widget below to the grid. Video is very choppy. It looks much smoother if I play it from Linux command line using gst-launch-1.0. Here is

Wayland crashes when label size in Gtk is large

I am using Wayland/Weston. Running a simple Python script that uses Gtk to display a couple of labels. If the size of the label font goes past a certain size (nothing unreasonable), Wayland crashes with error message "Error 71 (Protocol error) dispatching to Wayland display". I enabled WAYLAND_