In Orion v1 the filters (where conditions) provided to mostViewedVideosConnection were applied after the limit, ie.:

1. First the ids of limit number of most viewed videos were retrieved
2. Then id_in (https://github.com/Joystream/orion/blob/master/src/resolvers/queryNodeStitchingResolvers/helpers.ts#L37) was added to the provided where conditions to produce the final query

In Orion v2 the query is expected to work differently:

1. First apply the where conditions
2. Then return the limit most viewed videos among those that matched those where conditions