Actually, I don't think it is
Actually, it is. :) In fact, the sequence plays as normal video in Ep #210, but in Ep #211 it's a kinescope, which is why there's glare and the video quality of the capture of Barnabas' hand grabbing Willie's throat from Ep #211 isn't as good as the capture of Willie's horrified expression after just opening the coffin was from Ep #210:
(http://www.dsboards.com/eventimages/0417ds_3.jpg)
1967: Ep #210 - ...Willie is terrified to discover what's inside the
coffin.
(http://www.dsboards.com/eventimages/0418ds_0.jpg)
1967: Ep #211 - A hand reaches from out of the coffin to grab
Willie by the throat.