I tend to prefer to not get on with the housework/get on with it and let my DS learn to enjoy playing with his duplo and peppa toys than get caught on the slippery slope to too much TV, but a lot of parents might say our toddler already watches too much (but read on...). I find pretty much everything on TV too fast-paced/flickery, including Bob the Builder IMO. Of course my DS would love to watch it because it has diggers in it with faces on, but I personally felt it wasn't really that great for him, so we moved on after trying it for 1.5 episodes. But that doesn't mean we've banned all TV. Thomas is pitched at a level that is more suitable for his age group, and he gets that occasionally.
I know you've got problems setting up DVDs, but I really would recommend going back through the centuries and purchasing the Trumpton set (39 episodes, so very good value). Tons of soothing narration, slow-paced, made in the 60s so no whacky stuff pitched way beyond his age, and my DS is absolutely hooked on it because of the fire engine, windmill, crane, musical box, lovely songs...as was I back in the day (sigh!). I would also really recommend Bagpuss and the Clangers as a follow-on. Once you've watched these you might understand what the experts mean when they say TV aimed at toddlers tends to be cut so it's too fast for their attention spans to keep up. From what I've witnessed with my under-2, watching these programmes is more like having a story read to you and gives you time to ask questions, catch up and even interact (very sweet when my ds started waving to the Trumpton fire engine and the train every time they went along their route, and clapping when they played their little songs).
Because of this we've kind-of found ourselves watching sometimes 40 mins of this stuff per day with our DS (he doesn't watch it without us), but we also read to him and join in his play a lot (as he's our pfb, obvs) and he does tons of other stuff, and I actually see it as having been good for his language acquisition and understanding of the world because of the repetition and narration explaining what's happening on screen. I wouldn't have let DS watch more than 20 mins even of the slowest best-made contemporary stuff because the plotlines are IMO too complex/the digital images too bright and addictive. As for Baby Einstein DVDs, research has shown they're actually not good for IQ development, but I've never watched them so I can't say whether I'd have been more stupid than I am already if I'd cast my non-professional eye over them.