I cannot speak for scholars as a whole, but the professors in the History department of the University I attend give it approval with reservation. In a Great War History class last semester the channel was recommended to anyone who wanted to watch it as supplemental material.

However, the professors in the class said that while the information is accurate, it is also vague. Especially in the beginning of the channels existence it is not the best at giving exacts dates and times of events, but instead will give the rough area in time (Saying in the middle of March instead of March 17th for example).

They held it in the same regard as a Great War specific Wikipedia: good for general ideas and themes, but wasn't recommended for in depth research other than giving you a place to start.

I am Flo, one of the producers of the show and one discussion I had with a scholar (who happens to be a mod here but I forgot his username) was about the lack of post colonial perspective for our coverage of the African theaters especially. The most important criticism was - and I totally agree with that in hindsight - that we rarely talk about the Native perspective in the colonies. The few episodes we have prominently feature white officers for example because we have diary entries of them. And while post colonial perspective is hot in academia right now, it didn't make it into readily available secondary sources yet which we mainly use for the show. Something that the scholar acknowledged and we are trying to work on during the remaining time of the show.

I know that Nick Lloyd who wrote the recently published "Passchendaele - A New History" is a big fan of the show because it's good for sparking people's interest and for example gets them into considering engaging with more academic works. And I think from the comments I know a few more historians.

EDIT: I also talked to some people from the "Public History" departments from German universities. Not sure that's who you meant by "scholar" though.

Sorry if that's a bit more anecdotal than the usual quality in this sub but maybe discussions in the field of "public history" are also relevant once in a while.