fix video

electronics/readme.md

@@ -174,7 +174,7 @@ Here's what the sparking looks like:
 
 ![apid_bur](video/rapid_burn.gif)
 
-<video controls src="video/first_burn_crop_converted.mp4" width="600px">
+<video controls src="video/first_burn_crop_converted.mp4" width="600px"></video>
 
 And here's the hole I made… The cut is remarkably asymmetric; the tool (resistor lead) had som surface damage but remained largely in tact while a significant amount of the the workpiece (bullet connector) was worn away: