BG298 - This video is full of practical knowledge about working with oscilloscopes on the bench safely. We show both analog and digital scopes in use and how to use differential scope probes in high voltage cases.
Link to Dave @ EEVblog's video on Oscilloscope safety:
https://www.youtube.com/watch?v=xaELqAo4kkQ
Link to Micsig DP10013 High Voltage Differential Probe
https://www.amazon.com/Micsig-DP10013-Differential-Attenuation-Tektronix/dp/B074K4XPW3/ref=sr_1_2?crid=3PYE7F5BPHZEF&dchild=1&keywords=micsig+dp10013+high+voltage+differential+probe&qid=1610896515&sprefix=micsig+%2Caps%2C174&sr=8-2