I think this is an official BBC account on YouTube putting up full serials of classic Doctor Who.

Some great stuff here!

youtube.com/@BBCClassicDoctorW…
Some of my picks:

"The Happiness Patrol" (Sylvester McCoy)
(This was a great season, but I don't have this one on DVD. This is the next season for their Blu-Ray release series, BTW, also includes "Silver Nemesis" and "Remembrance of the Daleks", both great)

"Invasion of the Dinosaurs" (Jon Pertwee)
"The Time Warrior" (Jon Pertwee)
(I think had these on VHS, recorded off-air, but it's been a long time since I watched them).
#DoctorWho#JonPertwee#SylvesterMcCoy

Doctor Who: Classic

Welcome to the Doctor Who: Classic channel! Travel in the TARDIS with full episodes dating back to the Doctor's first incarnation.

^YouTube