Previously we have the video “16 ways to Unclog Toilet”
http://youtu.be/pRQkkMR1b5I as well as “How To Unclog Kitchen Sink” http://youtu.be/JgBu1WK5DdI. Many methods for the toilet & kitchen can be applied to the bathroom drain.
http://fetv.com/unclog-kitchen-sink/
https://handymanfix.com/unclog-kitchen-sink/